Here are a few links to websites that I visit regularly:
Uk Rivers Guidebook: Interesting forums for all things paddling in the UK, with lots of info about rivers.
Reading Uni Canoe Club: My ex-uni canoe club, inundated with ex-uni members - known as clingons- that for one reason or another have not left the Reading area.
Canoe Cafe: Another UK paddling forum.
Playak: Worldwide paddling news and updates from around the world.
Uk Freestyle All of the latest news, results and (occassionally) discussion from GB freestyle.