I'd be more than willing to donate a few bucks as long as 'this' version will always remain free and available.
Now a bit of flaming.. hopefully you don't take the xda user suggestions/trouble shooting/help testing etc etc and state "the beta version WAS free", delete it, then slap a $9 price tag on the pro version....
This software is licensed under LGPL - the sourcecode is available on google-code! This application will be free for now, in 2 weeks and in 20 years
If you really want to donate some bucks please give it to JesusFreke ... he really deserves it!
Regards,
Harry