CWP just runs through the web, so chances are you wouldn't be going through the gApp store to approve your app, you would just be pointing your users to whatever web solution runs your CWP application. No approval process, and also instant cross-platform compatibility (with blackberry and non-droid devices, pretty much anything with a mobile web browser).
My advice would be to not go it alone, if you have a profitable idea in mind, find a consultant or development house to do the hard PHP/CWP work for you, then rake in the rewards for yourself.
Also check out FMProMigrator, which converts filemaker files to PHP apps.
Thanks a million for great advice. I'm now confident that CWP is the way to go. My PHP is dodgy and there is no way I want to go at this alone in the short timeframe I have.
I will also have a close look at FMProMigrator, sounds very interesting.
Once again, thanks a million!!!