This is one of the things I've been suggesting all along. If you could add DirectInput support, I will be eternally grateful. Please, do it. Seriously, If you do, I will love you forever (okay, just kidding but still).
With DirectInput support, I could easily make a much better version of the space simulator I was working on before, since I'd be able to use analog stick detection through DirectInput. Plus, I could finally try making some games with console style controls (maybe a fighting game, that would be nice).