Ironic, I literally posted a topic about this just 1 minute after you (looked for topics on it earlier and did not see anything). I really hope this gets resolved...I put in a lot of work that I don't want to go to waste.
http://status.x10hosting.com/ This is why your files appear to be missing. Don't get too excited, once they get these servers back up I bet your files will be there just as before.
If you ever can't access all the files in your home directory, then it is very likely that the server has simply disconnected from it's SAN hard drive (ie. the files are still there, just not connected to the server).