Okay, I really try to not give plugs to projects that I know very little about, but I will make an exception in this case for a few reasons:
1. I know the lead developer, and he is top-notch. He is also a very solid dude, period. He is probably one of the only people that can make me believe it is possible to develop off of a vision alone. I owe him for that, because it is true.
2. It is actually a useful webapp.
If you tweet, twit, or user Twitter, there may be times where you want to display functionality either to your sales team, a potential lead, or a colleague.
Check out this twitter screencasting tool that is worth a mention if not 5 minutes of your time in case there is one time that this thing might be useful to you. I have already found an occasion to use it and as much as I wish I could claim I had something to do with it, that is not that case.
Best,
Josh