I'd make .edu a special case and give away a free subscription to any teacher who asks for one. In fact, that's exactly what I did with Twiddla, and it has pai

I'd make .edu a special case and give away a free subscription to any teacher who asks for one. In fact, that's exactly what I did with Twiddla, and it has paid off amazingly well in the form of ridiculously loyal, eternally grateful users and tons of free press. Better still, every student in every classroom that uses Twiddla today will eventually be wearing a suit and sitting in a conference room while a bunch of other guy in suits struggle to make WebEx work at all, and chances are he'll suggest this cool web meeting tool he used back in school. So if I were you guys, I'd re-do the math to see what it will cost to offer free accounts, but only to educational users. It was more than worth it for us.