vps.us works really well. I joined them about a year ago, after two previous hosting services went belly-up. The difference in service is immense - the systems are well set up, and the support staff know what they are talking about (not always the case with other companies). And they are very supportive. When I joined, the lowest tier Xen service had only 10GB of disk. They have subsequently upgraded to 20GB without charge, and the upgrade was seamless, all it required was a vps restart. I can't recommend highly enough.