I've kicked around ideas for something similar to, but not exactly like Twitter. I think there is possibly a market for more controlled, but still fairly fricti

I've kicked around ideas for something similar to, but not exactly like Twitter. I think there is possibly a market for more controlled, but still fairly frictionless information sharing similar to Twitter. For example: A group of us from the same company are going to JavaOne - how do we do stuff like share snippets about sessions we thought were useful or broadcast where and when we are going for dinner? Twitter itself isn't great for that, email lists are cumbersome and tricky to use from mobile - but if you could quickly create a group of some sort and have everyone join it, it would be fairly easy. It could also help avoid spam issues that plague Twitter - a while back, my previous employer held a small conference and gave out hashtag to use when tweeting about it. Spammers quickly co-opted the hashtag, which rendered it useless (this was doubly embarrassing since a lot of the spam was adult-oriented and my previous employer was a religious organization). Giving out a group + simple password would have dealt with that situation. I see a lot of potential uses for something like this, but whether you could convince enough people to use (and even more, pay for) it, I'm not sure.