Other Hot Wheels / Diecast Collector Clubs:
Rhode Island Hot Wheels Club
North Carolina Hot Wheels Association (NCHWA)
St.Louis Hot Wheels Club
South Texas Diecast Collectors

Other links of interest:  – Mattel’s own Hot Wheels site features forums, online shop and more.

Online Redline Guide  -Outstanding site dealing with the history, variations and collection of early Redline Hot Wheels. Careful…it’s seriously addictive!

The Toy Peddler -Online classified site specializing in diecast / toy items

South Texas Diecast Hot Wheels Guide -The “go to” reference for most every Hot Wheels casting.  Includes tons of great photos and even a pictorial “wheel” guide.