The problem is that I'm not sure it's even possible to get it running properly (e.g. with hardware acceleration) on every flavor of linux out there.

It's a real can of worms that one...

It is valid to target certain Linux distributions, so you can limit your scope to the ones with most exposure to desktop users. Ubuntu comes to mind...

Hrm, might do that. It already works in wine as well, just a bit buggy.

If you need certain drivers for it to work, just say that.