Webfaction! You can't go wrong. It's screaming fast with it's fine tuned nginx servers, 512MB so it's more than most shared hosting environments will give you for applications.
I'm a big Wordpress blogger and run http://winthecustomer.com. I've been offered several free VPS accounts from various hosting companies in exchange for a plug for their services but after testing them out, I end up sticking with my PAID shared hosting account with Webfaction.
I've been a HUGE fan for 4+ years now. $7 mo. is the best $7 of hosting you can buy and better than others that cost $20+ per month.
NOTE: Webfaction doesn't gimmick you with "unlimited" crap with their hosting accounts. When others offer "unlimited" they really should included about a million * next to that. I used to work in Web hosting and know for a fact that after several gigs of space or bandwidth usage, they'll kick you out and force you to upgrade or find another host.
