Not good enough. A guy with your skills should be donating your time to help work out all the issues. You'll get the pleasure of knowing you helped force all other proprietary developers into donating their time as well.
If people want to do it for free, go for it. Besides, most are done in C++ or Java, 2 of my least favorite programming languages. Now if someone wants them done in MS languages (except Visual C++ which I hate) let me know. =)