Good Old Rackspace
It's clear that they're feeling the heat, and while I don't like this kind of desperate promotional ethic, I'll give them the benefit of the doubt because they correctly identified the importance of many features that their cloud offers (default RAID, public IP, etc) that EC2 simply doesn't have and will probably never have. So it's true that you're getting much better value off the cuff, at least for me in the shared host instance. Despite one or two slips of grace, Rackspace have been there for me when Amazon haven't, even as Amazon push the price point further and further down.
Cheers,
Sabahattin