currently still in beta -- will have a new wrinkle beginning tomorrow: Quests. Quests task PlayStation Rewards members with performing certain activities, for which they will be rewarded with progress toward Select, Pro and Legendary member status. The activities mentioned on PlayStation Blog all seem geared toward getting players to check out various services that may be unfamiliar.
For example, the "Check Your Pulse" quest rewards players for watching an episode of Pulse on PSN, or you could play a specified PlayStation Move game to complete the "Move It" quest. And, of course, the "No Place Like Home" quest involves visiting the central plaza in PlayStation Home. The new quest system should go live in the PlayStation Rewards beta tomorrow. Nine quests will be available initially, with Sony promising more throughout the year.