Bricklink – Like eBay, but for LEGO
Brickset – Database of LEGO sets
FBTB.net – From Bricks To Bothans; another LEGO Star Wars fan site
Eurobricks Star Wars Forum – One of the biggest LEGO Star Wars forums on the ‘Net
Imperium der Steine – Also a LEGO Star Wars fan site with a forum, and they always seem to come up with the leaks first.
flickr – Image hosting, not specifically for LEGO, but has one of the biggest LEGO communities.
Brickshelf – Quality LEGO image hosting, without any bells and whistles. Unlimited data, support for .lxf and .ldr files, and zero tolerance for distracting non-LEGO uploads are some of the high notes.
MOCpages – Image hosting with unlimited uploads and a community, but image quality isn’t the best.