30x500 teaches two things: 1) How to uncover real problems that people are wiling to pay you to resolve 2) How to speak to those people in words they can understand (like 30x500.com speaks to people who don't know what to build).
The classes are live, but are basically just a series of pre-recorded videos that you watch along with your classmates and have limited time to discuss afterwards. Nearly everything done outside of that class (if you choose to pay extra) is an automated series of emails that you work on alone.
The teachers (Amy & Alex) are night and day. Amy is the ringleader. She is very pig-headed and will not tolerate ideas that do not fall inline with hers. She is quick to belittle people in front of the entire class and has zero patience. Alex is very helpful, easy-going, and open to exploring all ideas. Both seem to be extremely busy outside of the 30x500 world (with other businesses, vacations, and/or personal activities), so don't expect much interaction with them outside of the live classes. They are quick to respond up until the point where you've paid. But, their interest drops off pretty steeply after that point.
Is this a scam? No. But, it's not a silver bullet either. It does teach a few important concepts that are probably not so obvious to many people. The real trick is figuring out how to apply them yourself.
I think this class would be best delivered as an eBook -- since the teachers seem to want to fully automate most of it anyhow. I'm guessing live classes have more money-making potential though.
Note: I took this class in February. Amy kicked me out mid-course for no apparent reason (she would not respond to me, so I really don't know). I had to contact my credit card company to dispute the charge and get a refund. The little bit of knowledge that I did gain was surely not worth the time, money, or hassle involved. Buyer beware.