If you had developed the application 100% on your own time and effort, I'd say just go do whatever you want with it... but seeing that the community (well, a few prominent people here) had given quite a bit of assistance of some fashion, I'd say that it'd be nice if you take that into account and 'give back' to the community (or those people) somehow.

Then again, it's all up to you

Btw, going "the Ovi route" introduce yet another infamous 'pain point' that many of us have experienced. It's not available in all countries (yet?), their payment system had a few issues, on top of a few niggling UI/UX issues...

Best of luck, mate.