Useful Links
Bob Dunsire Bagpipe Forums: http://forums.bobdunsire.com/forums/index.php - why is it useful? Lots of great tips and stories from bandspeople from all around the world at all different stages of their playing careers.
Pipers Persuasion: http://piperspersuasion.com - Bringing piping history back to life
Bagpipe Lessons: http://bagpipelessons.com - Jori Chisholm's site for teaching. Jori is a great teacher and I've had the chance to be involved with him at the Canberra College of Piping and Drumming.
The UK National Piping Centre: http://www.thepipingcentre.co.uk/ - lots of interesting info here!
The Bagpipe Place: http://www.thebagpipeplace.com - the Grand daddy of them all with tonnes of great information
Jim McGillvray's excellent Pipe Tunes site: www.pipetunes.ca
Also check out Pipes|Drums for all sorts of great articles: www.pipesdrums.com (subscription is required for some bits)