Yowzah. Looks like Lycos.com is down and they've taken Tripod with them.
I'm not a networking expert but this smells like a DNS issue (Tripod's now merely a sub-domain of Lycos.com).
The Lycos.co.uk site is up and running.
Update: It's 00:45am GMT and Lycos.com is back up.
Computer World has more details. An outage at Savvis, a hosting provider, described as a cascade of failures was to blame.