I'm not affiliated with them (I do have a $10/month account there), but http://www.medialayer.com/ has been excellent and incredibly fast for shared hosting. They run the Litespeed web server with PHP5, eAccelerator, and Zend Optimizer. The only downside is the price: you don't get much bandwidth, but this can be had as a good thing since it means they don't oversell. My blog (http://robgabaree.com/) is running on it, but it's new so there's not many posts. SliceHost is great if you know how to manage a server -- $20 a month with full access.