Seems like Serverway got hacked. Bloody hell. All files starting with "index" have been replaced by some "fuck Israel/America" page ("IF You Stop War We Will Be Stop Hacking" because, of course, no one has more influence over the US and Israeli governments than a small hosting company) - 505 and Simple pages still work (except the developer pages), most of the other things don't. I'll try to get everything back up tomorrow, assuming Serverway don't fix it themselves.
update: serverway are doing precisely fuck-all. also i don't seem to have local copies of some of the files, so i may have to try and grab them from the caches of other random computers i've used to view the pages. bollocks.