A Pack A Day - uh, they open a pack a day
Baseball Card Blog - they specialize in countdowns of baseball card editions
Beginner's Guide to Grading and Condition - easy way to determine condition of cards
Craig's Topps Baseball Card Web Site - just a dude (with my same name) that collects cards
Mark's Condition Guide - easier guide on condition
Set Builder Central - people trying to put together base sets
Sports Card Blog Directory - almost every site
Sports Card Fun - message board for trading baseball cards
Wax Heaven - some funny box breaks