Links of Interest

Dungeon and Dragons

D&D Insider - Two amazing digital magazines for both players and DMs, plus several digital tools in development. You will also find information about the D&D miniature game, D&D settings, and the RPGA, not to mention forums and many community resources.
Asmor.com - Developer of several D&D related scripts and programs. My favorite are the random encounter generator and the monster maker for 4th Edition.
Enworld.org - Huge community of gamers.
Online 4E Character Generator - Absolutely the quickest and easiest way to make a 4th Edition D&D character.
Grandpa's Power Cards - These are great for printing out your characters at-will, encounter, and daily powers.
Shado's PDF Character Sheets - Nice landscape character sheet
Kiznit's PDF Character Sheets - Wonderful and creative character sheet with pouch for power cards.
Many more fan created Character Sheets
Random Name Generator - WotC has a nice random name generator to help make up names for your NPC or PCs.

Dungeon and Dragons Miniatures

Official Website - Wizards official minis website, complete with a gallery of each set.
DDShoebox.com - Manage your collection and preview other user's warbands.
MiniatureTrading.com - Organize trading of your extra minis with this website.

World of Warcraft TCG

Official Website - Upperdeck's official website with tons of information and resources.
Wowtcgdb.com - WoW TCG database of all cards and user constructed decks.

World of Warcraft Minis

Other Sites of Interest

RPGBloggers.com - Access to all the RPG blogs you could ever want or need.
NearbyGamers.com - Find gamers in your area that are looking to play a variety of games.
WearMonsters.com - Monster Shirts
WearAnimals.com - Funny and Cute Animal Shirts