http://rb3d.d3rwolf.de
Looks like site is down :(
But Funday still on , see you there S!

D3rWolF's Training Day

Open Server, no password. Train your (s)kill!

D3rWolF's Spielwiese

Every Saturday at 22:00 CET Team Melee. No Password

Add the following lines to your mplayer.ini:

[MetaServers]
Server=TCP:216.18.240.30:6001 ; Pop's
Server=TCP:rlgb.xs4all.nl:6001 ; Rens

[KnownServers]
Server=UDP:rb3d.d3rwolf.de:47801 ; D3rWolf's Spielwiese
Server=UDP:rb3d.d3rwolf.de:47802 ; D3rWolf's Training Day

I registered. To those, the portal is in German. After pressing the Registar button, there is an option to make the text English to help you get through the registration process. After filling out details and dealing with the email confirmation, site will be in German again until you login, then it is back to English.