MAME, the ultimate arcade emulator, has been upgraded to version 0.72. Check out the MorphOS MAME page: HERE. A direct download is available from this LINK.
For a list of official changes, see Mame.net's Whats New document.
If you've wondered into the comments, you'll find out that there will be another exciting thing happen today! Yes, hold on to your shorts.. <i>Somthing</i> is coming!
Actually, MAME has supported joystick for a while. You really need to go in and configure MAME for it. Just hit the TAB when a game is loaded, and look for the global input item. Then, you can assign joypad buttons just like they were keyboard buttons.