I Started using Sheepshaver after discovering it was Os 9 capable, as PearPC and BasiliskII are not.
Again, for lack of an Apple Computer, I use this currently for testing web sites on multiple platforms.

I find it very responsive, even on my old PC, internet could be sped up however...

More soon to follow...

I've just got Sheepshaver working under Ubuntu with my excisting drive image and ROM, http://www.scothiam.com/Sheepshaver_Ubuntu
NOW also on my Intel Macbook http://www.scothiam.com/content/sheepshaver-os-x-intel