Here are some important links to other sites in the LEGO community and a few links to peoples' work using the LDraw tools.
Possibly the most important and most central website to the whole of the online LEGO enthusiast community. Includes an extensive searchable set database and categorized LEGO-related discussion groups (including CAD discussion).
Library of thousands of official LEGO instruction scans, catalogs, and a member gallery for posting images of LEGO creations and anything LEGO-related.
The official LEGO website. Contains product information, special interest sections, information on the LEGO company and an online store (shop.lego.com).
Bricks on the Brain - Building Instructions Portal
Jake McKee's database of LEGO® building instructions online. Links to LDraw-formatted instructions as well as photo/image instructions.
From Bricks to Bothans
The premiere LEGO Star Wars fan site. Many LDraw users frequent the site, posting models and participating in their online discussuion forums.
Don Dueck's Website
Don Dueck has created a download mirror for LDraw, MLCAD, LeoCAD, L3P, L3PAO, and POV-Ray with setup instructions.
Bram Lambrecht's LEGO Site
View Bram's many incredible renderings and his equally impressive LEGO models.