This is because my server pretty much doesn't work anymore and probably will never work like it used to ever again.
I've moved the Budehuc MUCK web page over to http://yetta.net/~arcana/budehuc/. I've also moved the MUCK itself, but that's pretty invisible and you should be able to connect using budehuc.mine.nu 7999 as before.
Oh, and the forums don't work anymore either. I don't have access to set up forums on the web host. I want to try to get http://budehuc.mine.nu/ pointing to the new page but that might take time.
In any case the MUCK is online, and that's what counts, right? If you can, log in, have fun, and bring your friends. :)