It's not like I'm not using my Amiga otherwise, but I was quite surprised when I realized how much I have to use my Amiga for a little Nintendo DS homebrew project I want to do.
The game I have in mind is a simple Lunar Lander game. I have installed all the dev tools including DS emulator on my Mac, but I don't have a tool to draw the graphics on the Mac. The best tool I know of is DPaintIV, which basically means I'm going to use my Amiga 1200 to create all the graphics such as sprites and background. I only need to develop some code on the Amiga to convert the iff-files to C-source code.
The game will also need music. There's a good library called PAlib for homebrew Nintendo DS development and this library comes with a module player routine! This means I will also use my Amiga to create the music for the game.
The only thing left is coding the game and trying it out in an emulator. This will be done on the Mac, but all the artistic work will be done on the Amiga, not because it can be done. It's because it's the best way to get it done.