Personal security system

1. A method for providing assistance to each of a plurality of users, each of said users having been enrolled as a member of a community, said method comprising receiving, at a server, a first communication, said first communication having come from a first mobile device associated with a first user from said plurality of users, said first user having been enrolled as a member of a first community, said first communication having been initiated by activation of a personal security button on said first mobile device, said personal security button being configured to issue a notification indicative of a first security condition associated with said first user, receiving, at said server, a second communication, said second communication having come from a second mobile device associated with a second user from said plurality of users, said second user having been enrolled as a member of said first community, said second communication having been initiated by activation of a personal security button on said second mobile device, said personal security button being configured to issue a notification indicative of a second security condition that differs from said first security condition, said second security condition being associated with said second user, in response to said first communication, causing said server to alert a first security service, said first security service being a security service that is appropriate for responding to said first security condition, and in response to said second communication, causing said server to alert a second security service that differs from said first security service, said second security service being a security service that is appropriate for responding to said second security condition.

2. The method of claim 1 , further comprising displaying, to said first security service, information characterizing said first user, and displaying, to said second security service, information characterizing said second user.

3. The method of claim 2 , further comprising, in response to said first communication, sending a communication from said first security service to said first mobile device, and in response to said second communication, sending a communication from said second security service to said second mobile device.

4. The method of claim 1 , further comprising displaying, to said first security service, information characterizing said first user and said first security condition, and displaying, to said second security service, information characterizing said second user and said second security condition.

5. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to alert campus police.

6. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to alert a caregiver of said first user.

7. The method of claim 1 , wherein said personal security button on said first mobile device is on a home screen of said first mobile device, and wherein said personal security button on said second mobile device is on a home screen of said second mobile device.

8. The method of claim 1 , wherein said personal security button on said first mobile device is on a dashboard of said first mobile device, and wherein said personal security button on said second mobile device is on a dashboard of said second mobile device.

9. The method of claim 1 , wherein said personal security button on said first mobile device is configured to provide one-touch access to said first security service, and wherein said personal security button on said second mobile device is configured to provide one-touch access to said second security service.

10. The method of claim 1 , wherein said first and second security services are different security services.

11. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to select said first security service based at least in part on said community.

12. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to select said first security service based at least in part on said location of said first mobile device.

13. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to select said first security service based at least in part on a last-known location of said first mobile device.

14. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to select said first security service based at least in part on a failure to receive a communication from said first mobile device.

15. The method of claim 1 , wherein receiving, at a server, a first communication comprises receiving an SMS message.

16. The method of claim 1 , further comprising causing said server to send a query to a location-based server to identify a location of said first mobile device.

17. The method of claim 1 , wherein first and second users are personnel on a military base.

18. The method of claim 1 , wherein first and second users are residents of a housing development.

19. The method of claim 1 , wherein first and second users are members of a special-interest group.

20. The method of claim 1 , wherein first and second users are guests of a first hotel.

21. The method of claim 1 , wherein said first and second users are inhabitants of a city who have registered for services provided by said server.

22. The method of claim 1 , wherein causing said server to alert a first security service comprises causing said server to select said first security service based at least in part on entry of said mobile phone into a location.