In order to regulate network strain, AT&T and Sony will only allow for basic functions to be accessed over 3G, such as web browsing, PSN messaging, asynchronous multiplayer (i.e. turn-based games) and leaderboard access. If users want to play with other players online in realtime or download a larger game (assumed to be 20MBs or more) from the PSN, they will be required to connect to a Wi-Fi network. While the ability to message friends over the PSN and check leaderboard scores anytime, anywhere is certainly helpful, we'd hardly consider it worth the added monthly expense.