It seems that what was once one of the more reliable projects is experiencing a bad run. To quote the only info available from the website:

"Tue Aug 11 23:26:28 UTC 2009

Einstein@Home is down as the result of yet another fileserver crash. We are
working on repairing the filesystem now but it will likely take a couple days
before the project is running again. Further news will be posted here.

Thank you for your patience."

Update - the site remains down, with no further news at this stage.

The project is finally back up and running again. Let's hope they'll be able to reestablish their excellent up-time reliability.

These file server issues across a number of projects have been quite bad lately.