From Seti Boinc site:
June 1, 2005
We are switching the http://setiathome.berkeley.edu/ URL to point here. The SETI@home Classic web site has been moved to http://seticlassic.ssl.berkeley.edu.
Probably.
That and probably they cant cope with Bilko’s dump! 
It’s probably to end the connection all of the long forgotten computers that have been crunching for years without being monitored. I wonder what percentage of those still crunching classic make up that category.
I would say there probably are alot of forgotten crunchers running…
Bad thing is the seti versions are probably out of date and theyre not really doing anything anymore… 