CBS.com Innertube -- Watch the latest episode, promo, and behind the scenes specials

Official CSI Site -- CBS site with offical CSI information

YTDaW -- Message board with spoilers, speculation, and all kinds of goodies

CrimeLab.NL -- CSI along with some other crime-related shows. In-depth info

GrissomSaraRomance.com -- GSR along with general info

CSIunofficial.com -- General CSI info for the show and careers

CSI Transcripts -- CSI Transcripts, but other shows are on the site, too

Crime Scene Evidence Files -- Not the show - real crime scene stuff & products

FanFiction.net: CSI Show -- CSI FanFiction, but many, many other shows on the site, too

Arrowhead Forensics -- Place to purchase forensic supplies

Elyse's CSI Music -- Lists the songs used in the episodes for all three CSIs

Kestin Stewart's CSI Videos -- A great number of awesome vidoes - GSR & general (NOTE: site seems to be down)

Jorja Fox: Online -- All about Jorja Fox (unofficial)

PureJorja.net -- All about Jorja Fox (unofficial)

Jorja Fox's Official site -- Well... It's her site...

William Petersen Appreciation Page -- All about Billy Petersen (unofficial)

BillyPetersen.net -- All about Billy Petersen (unofficial)