Not sure if Amiga emulation is a taboo subject in these parts (I see there's plenty of hardware discussion on here ), but if not there's an online Dynablaster tournament taking place on 30th April at 7pm UK time.
The games are played using AmigaLive (essentially a user-friendly front end for the FS-UAE Amiga emulator). I use it, and think it's pretty decent. And it's free, which is always nice.
Anyway, I'm taking part and if anyone else is interested info is at AmigaLive.com/GameTime