This application was developed with PHP, Cake PHP, Web Services API, jQuery, and the jQuery Mobile Framework.
Since the Meetup API has a limitation of 100 queries per hour, I implimented a caching mechansism to reduce multiple calls to the API, and to speed up the application.
Then I wrote an Apache .htaccess that conditionally redirects visits to bostonphp.org to this site (m.bostonphp.org).
Here is a list of what I used:
This web app should run on just about any mobile device. Check here for a complete list.