[onebluebrick]

Working on a simple, private, short-term mobile group communication tool called Fast Society.

It automatically connects friends who are going to a concert, on vacation, or just out for a night of drinking over SMS and has a ton of cool functions to communicate during and share content after the event.

Launching soon at http://www.fastsociety.com/ (still waiting on carrier approval)

[lefstathiou]

I just launched a mobile group communication tool recently. A fun yet grueling process. I am eager to see yours in action. Will it be available on the iPhone?

feel free to reach out to me to chat. [e-mail]

my app is called groupie. www.groupie.mobi

[wallflower]

Have you considered ad-hoc networking (e.g. iPhone short-range bluetooth)?