I moved olbert.com over to Webfaction a few days ago, mostly because they support Subversion and Redmine (a nifty multi-project alternative to Trac).
But I’ve been very impressed with how Webfaction lets you configure and manage your sites. They have a unique (well, I’ve never seen it elsewhere :)) control panel which lets you separately create sites and applications, and then bind them together to form a web interface. It takes a little getting used to, mostly because it’s different from every other control panel I’ve seen, but once you do it’s possible to do some clever things pretty easily. Add to that responsive tech support, good availability and reasonable prices, and you’ll arrive at a very nice customer experience.