Yesterday he upgraded to the latest ViewVC and since then it hasn't given any trouble, so you can browse the repositories again. It might start breaking again of course; so keep your fingers crossed. :-) (If something there isn't working, please let us know).
There were a few brief service interruptions for some services while I was in the datacenter earlier (moving some cables around and trying to get an old switch to talk to our console server). All should be well now.