This could be the key to DOS adventure gaming on a tablet.
Nyko Playpad Pro Bluetooth controller. Has anyone tried this? I saw a demo of this and thought it was really cool. Looking at the specs, I found it has mouse support! Point-and-click is now a reality on Android tablets. There is a DosBox app in the Google store, and I've tried out a mobile Exult app to play Ultima 7, but it was unplayable without mouse. Yes, I suppose you could use a bluetooth mouse on most tablets, but this is a lot more versatile. Wish list!
The iDroid Bluetooth Gaming Controller from ThinkGeek is also extremely versatile, including controller, mouse, and keyboard support, AND works as an iOS iCade app controller!