Mine is http://twitter.com/timhaines and BurnBall, my newest game has it's own twitter feed (for competition updates etc) at http://twitter.com/BurnBall
I'm really glad I could help. Twitter is not exactly what it was intended to be, in fact it turned out to be good for a lot more than just sharing personal activities with family/friends. It's a large community, but the difference from forums is that everyone uses Twitter in his/her personal way. So it may not immediately be clear what's the best way for YOU to use it, but on the other hand - there's quite a good chance that you'll find a way to use it that fits your needs.
Alright...for those still confused about Twitter: What I'm realizing is that certain people will follow you and in return, you follow them. Thus, you create more of a "foundation" of friends in which you can openly communicate? And that's also how you gain more followers? I've also realized there is a Chinese girl in a tank top that is basically an advertisement...so tell her to stop following you if she's made your list
Reminder that the iPhone-focused blog I founded (RazorianFly.com), also has a twitter account. Follow us at @razorianfly. R-Fly
if you think someone's tweets are spam, "block" the person. (Twitter will get notified if enough people do this, and they'll investigate). If you don't care for someone's tweets, don't follow back. If you do care for someone's tweets, his conversations with others, or if you want to communicate with someone, be sure that you follow the person (and that the other one follows you, otherwise he won't get your messages!)
@VeiledGames I'm pretty good at talking back... and I update a lot... probably too much, unless you're really interested in what I think of today's soup.
I might get into Twitter soon. I had set up a personal account a few days ago but it didn't work, so I'll wait a while until I try again.
Our tweet is http://twitter.com/SchenkStudios We should have several new apps coming out any day now!