I just bought a compaq 6000 series, here are the specs:
AMD Turion 2.0 Single Core
1gig Dual Channel ram
Nvidia go 6150 Graphics card
Windows Vista
It can run sro on low graphics on the highest resolution due to its widescreen, but is pretty laggy, good for stalling and shopping but not grinding, unless you are use to it. My main machine is a fully built gaming machine so it runs everything max..im spoiled

Im sure that since vista is demanding 1gig to run aero this probally affects sro's game play, im about to install XPsp2 on it until Vista works out its problems.
The laptop also is ran on a wireless broadband network so this may contribute to the laggyness, I need to test it on a wired connection.