There are a lot of links to active content on Go. Some of the ones I track are:

Go News - Japanese, but good site to see the tournaments trees that are active

Go, An Addictive Game is one of my favorites

Go4Go database http://www.go4go.net/v2/
Huge collection of Go game records, daily updates, pro commentaries from Alexander Dinershteyn 1p (who can also be found throughout the Russian Go Portal (site, mainly in Russian), but includes Russian news, clubs, pictures, tournaments, game records etc. or Alex's own page http://breakfast.go4go.net/... where he also offers lessons). Usually have games a bit earlier than the #1 mentioned site.

“Goama”, International Go Newsletter
Go news, commented games, stories, pictures etc.

I also occasionally browse rec.games.go, but there's a lot of non-Go discussions going on

Sensei's is a fantastic reference point: http://senseis.xmp.net/

I wish I read more from The Magic of Go but never seem to have the time to get into the deep content

If there's one you like that you think I should hit, please send me the link!