ohthenoes at dreamhost almost having the site is “to much cpu usage”. I had sites there, with 5-10 uniques a day, and still got 404 errors all the time, not because of missing files, but because the “process watcher” killed the script. The only “strange” thing is that same sites, same install, same plugins, same user base now work flawless on a 3 buck shared hosting… and not just alone, but together with 20 other sites like that. and this was not even a multisite.
and there is more than one webhost like this. do a research on a few webhosting boards, and you will manage to find yourself good deals.
PS. the user ratings with stars are not always that accurate as they seem…
