I'm always curious about this, too. For anyone who's gone this route (as described in saluki's response), how long have you been able to put off business formation?
The concern I've always had is, what happens if you get some corporate customers, and they ask "Who is Johnny Blades, and why is he billing us $99 a month?"
For those who've encountered this situation (and aren't just speculating), were there any problems?