For those that retro game

GOG is running one of their redonkulous sales, so you can pick up most of the D&D titles for around $20.  Not $20 each, just $20.  And other similar 50-85% off crazieness (or $2-$5 if you prefer to think of it that way).  They are also finally getting in to the multiplayer platform market, ala Steam, and say they are workign to allow interaction with Steam users as well...