Numismatic Links:
CoinFacts.com - a virtual online encyclopedia of coins.

Coin Grading Services:
PCI -- PCI submission form - (.PDF)
PCGS - Professional Coin Grading Service
ICG - Independent Coin Grading Company
NGC - Numismatic Guaranty Corporation of America

Online Auctions / Coin Dealers:
eBay
Yahoo
Amazon.com
TeleTrade

Members Online Auctions:
John "Bud" Holton --  "20centman" on eBay
Bob and Annette auctions on Amazon

Other Coin Clubs:
Bellaire Coin Club
Greater Houston Coin Club
Beaumont Coin Club
Greater Port Arthur Coin Club

Newsletters:
Coin Connoisseur
Coin Today

Coin Shows:
Coin Shows

Museums:
The National Numismatic Collection at the Smithsonian Institution
The Museum of Biblical Coins