The new disk swapper is somewhat useful, and definately has potential. As stupid as it sounds, I really like the floppy sound emulation, too! I'm gonna have to make my own HQ samples. :-)
Also made my own trainer for Day of the Viper using hacked save states. Woo! I'll actually be able to finish that game, now!
Hmm... I forget. Didn't WinUAE have a debugger console at one point? I didn't see any mention of it in the documentation. I'd really like to make a proper trainter for DotV. That game is awesome.