I've released GoSWF, a flash viewer for Go game.
GOSWF is freeware, and designed to be used on forum, websites.
The colors can be changed to match the hosting website color style.
Currently, GOSWF is used on goigo.org forum (games are visible only for registered users), and british go association.
I'm working on a stand-alone version (PC), for fast and easy SGF viewing (SGF is the standard format for go games).
Some editing features should be added in both versions (online + standalone).
About Go: an ancient asian strategy game. Some day, I will have to tell why I love this game so much !! Recently (in comparison with go 4000 years history), Go game has gained a popularity boost thanks to Hikaru no Go manga (and anime).