The European Go Federation (EGF) is the principal organising body for Go in Europe.
The EGF maintains a Europe-wide rating list of all players appearing in European tournaments. It is updated and published on a monthly basis. A description of the rating scheme can be found at the
go rating pages of the EGF. And if you are too impatient to wait for the new rating list to be published, you can use mgoetze's
GoR Calculator.
Starting January 2003, the EGF organises European go-related news in the electronic Go European News newsletter.
For offline calculations you can also try CBlue's EGF-Calc.