Besides, myspace and facebook do you know of any other mobile communities.
I am interested in what features would be good in a mobile community.
Heres one I built a few months ago. Feel free to try it out and let me know what you think or what it needs. The community has chat, groups, buddy's, shouts, forums and more. The next version will be fully integrated into joomla's community builder.
http://mobiquio.com/go/mobi_com/
BWT: If you demo the site your information will be deleted when the site is moved and finalized.