Note that the Mini is a desktop computer. You had mentioned earlier that you wanted a notebook computer, not a desktop.
Also, I'm not entirely sure how good the Mini will be for gaming. The Video accelerator is built-in to the Intel Chipset and uses shared memory so you'll
need that 1gb of RAM if you want to play games on OS X.
But, since its the Intel CoreDuo processor, music software will fly at top-speed, and you can even partition your hard drive and install Windows XP if you like.
If you choose to buy the Mini, don't forget that you need to have your own Monitor and USB keyboard/mouse to use since it doesn't come with its own.