HotkeyNet's user numbers are growing slowly. If they get large enough, at some point I'll start charging for it. If they don't, I won't bother.
As a result, I can't say how long the program will remain free. But I can tell you this:
— The program has been free since October 2007.
— It will probably be free at least until October 2010.
— It may be free even longer.
— If I decide to start charging for the program, I'll give at least six months notice.