Darting Accessories
There are loads out there. A180 darts is a good one. Other popular ones include Red Dragon Darts and Darts Corner. Just search in google.
Ebay has a good source of accessories too, particularly on personalised dart flights. Can get upto 20 sets (so 60 flights) for under a tenner.
Dart Organisations
Official site of the Professional Darts Corporation includes news, rankings, and player profiles.
Official site of the British Darts Organisation including event information, tournament results, divisional information and links.
University Dart Website
A lot of university teams have pages on facebook so check it out. A good general facebook group it here
Oxford University Darts Club including varsity match information, league tables, links to other dart websites and latest news.