From the latest issue of OPM.
Hopefully the stats are detailed and not just the simple "Wins, T5s, T10s, DNFs, Laps" system."My Lounge is GT5's hub from which you'll access all of GT5's new online features. Hit the Community tab and you'll pull up a bulletin board filled with your latest stats and your recent mail from friends and other players.
You can browse through your friends' bulletin boards and check their progress on and offline, and send out mail and challenges. My Lounge supports voice chat for up to 32 players and lets you host 16-player online races or spectate on races in progress, as well as watch the GT-TV VOD service and race replays."