I hope that you haven't bought your Mini yet.
I found out that my Mini has a Matshita UJ-835F Superdrive, and it's absolute rubbish.
Using Toast 6, it constantly creates coasters, because underrun protection isn't possible when burning DVDs. It's total BS.
I now have to go buy a Pioneer drive that has underrun protection for burning DVDs.
Apple must have been desperate... I can't believe they used this matshitty drive.
So buy your Mini with "cheapest CD drive", get internal bluetooth/airport, and minimum ram (upgrade it yourself to 1gig, as even 512MB isn't great with tiger).
The solution is that I have to pay US$120 for a Pioneer DVD Burner. And I'm gonna smash my matshita drive into thousands of little pieces, because if I sold it, I'd be passing on my nightmares, and my conscience couldn't stand passing on that much pain to another human being.
Using an external Bluetooth USB dongle is also not a great solution, and is risky when compared to the internal option.
Hope that your learn from my mistakes.
Chris