Recently, enwiki was apparently moved without warning to a new server. This caused the external toolserver to be unable to perform any analysis of enwiki information. One of the major users of toolserver is Gmaxwell, who performs several different beneficial processes using the toolserver.
He has posted to WikiTech-L explaining what happened and what the effects are: http://mail.wikipedia.org/pipermail/wikitech-l/2006-April/034904.html
There is also an essay forming at: http://en.wikipedia.org/wiki/Wikipedia:Toolserver
I urge everyone to visit one or both of the above links to learn more and to express your support for getting the situation resolved.
Johntex.