[perssontm]

Just get an account at www.crossbrowsertesting.com . I did around 2 years back I think, and its really convenient. you vnc to whatever os/browser combo you like and test it out. They have a demo for local testing as well, but I've always used a reverse ssh tunnel for that.

Note, Im not affiliated with crossbrowsertesting.com in any way.

[iandanforth]

I have also enjoyed the Scout service from Saucelabs. It is a fully in-browser experience. They do all the VM work and stream you the screen.

Full Disclosure: I am friends with one of the founders and was in a promotional video for saucelabs.