It does have massive potential.
I'm not happy to hear that they might charge for updates. Hopefully those are just untrue rumors. I haven't seen anything that corroborates them.
Okay actually just read their blog post (seems like a good group of guys):
This has been an ongoing misconception since it was announced that we will charge for updates. Let me make this as clear as I can: We are not going to charge you to fix your current application. Any thing wrong with the current application will be updated for free until it?s stable. Beyond that, minor improvements and enhances will be free. We will, however, charge for major upgrades if we deem it necessary.
We?re definitely going to make this up to you guys. We haven?t figured out how yet, however yes, free major upgrades is something we will take into consideration.
Hopefully this answers most of your major questions. We are going to be getting a ticket system in place to handle bug reports, support, and feature requests shortly.