Good quality poker site, with introduction to rules, strategy and a well maintained link guide. Small - but very good quality of the content. Covers Texas Hold'em, 7-card-stud (Hi and Hi-Lo) and Omaha Hi-Lo.
Poker1.com is the home of Mike Caro's University of Poker and other online resources. It presents the "University" with 43 (!) lectures, test and strategy articles. There are also a lot of material on odds, rules, audio/video clips, tips and other. Also offers shop and forum. Very high quality and broad scope in the online strategy tutorials. Highly recommended!
PokerStars is the largest online poker room in the world, with massive action at all stakes and skill levels. It's the place to go for tournaments, with the world's largest guarantees, an impressive 24/7 schedule and excellent software. PokerStars also sponsors some of the world’s most famous poker players, including Daniel Negreanu and WSOP Main Event champs Chris Moneymaker, Joe Hachem and Greg Raymer, who you can find at the tables to play or chat with. Sign up via PokerListings link and get a $600 bonus at 100% match.
Become an Omaha Hi Lo pro and teach all those new players how to live.