Coin Magic Resources:
Real Silver Gaff Coins: This is just a website I found that carries real silver coin gaffs.
Sasco Magic: Makes gimmicked coins as well.
The Coin Craft Line: This company makes custom promotional coins out of different alloys. If you needed a coin custom crafted with your name etc. as a promotional handout or audience give-away. Anything from multi-colored aluminum coins to solid silver dollar size coins (even 24KT gold coins!)
Lassen Coin Gaffs - Coin Gaffs by Todd Lassen - custom hand crafted coin gaffs.
Coin Magic Chat Forums:
The Coin Purse Forum: This is the forum shared by this site and The Coin purse, and is dedicated solely to the discussion of coin magic.
The Magic Cafe: A pretty extensive magic forum hosted by Steve Brooks. The "Show Me the Money" forum is specific to coin magic.
New York Coin Magic - Some of the biggest names in coin magic: David Roth, Michael Rubinstein, Geoff Latta, Mike Gallo. This is their website where you can buy the latest offerings from them.
David Neighbor's Coin Magic notes: David Neighbors, "The Coinjurer" has been creating coin magic for years. There is a lot of coin magic notes available from David. Take a look at his list of notes.
Lybrary.com: This is a source to acquire eBooks on magic. This is very nice especially for books that are out of print or hard to get. The prices on them are also well under traditional books. I personally have Bobo's "Modern Coin Magic", Buckley's "Principles and Deceptions", and T. Nelson Downs' "Modern Coin Manipulation" on CD from Lybrary.com. Jean Hugard's "Coin Magic" will be available soon.
The Collected Wisdom of MagicTalk: This is a categorized compilation of some of the most interesting threads of discussion at MagicTalk.