I recommend giving PHPFog a try.<p>I've been running a good-traffic site on PHPFog for about 6 months on the $29 plan. The product has some issues but, overall, I'm quite fond of it, the site speed, newrelic monitoring that they bundle in, and responsiveness of support.<p>Here are a few subtleties you may uncover. These may or may not be deal-breakers for you - they weren't for me (at least, yet):<p>1) No control over client-side caching policies via .htaccess. Though, I've heard it's in the works.
2) $5 subdomains seem highly priced. I would be using them if not for that.
3) No SLA (i.e. availability) which makes me a bit jittery.
4) Documentation is murky on MySQL resource usage limits (other than disk space).
5) Flashy error pages from PHPFog when/if the service is down make no secret about where the site is hosted and instance status. Some discretion is probably in order.<p>There's always room to improve ;)<p>Keep up the good work, PHPFog!