Players of Diablo 3 will not play be able to play the same characters on their PlayStation as they do on their computers. In a battle.net forum post by Vaeflare, it was confirmed that there will be no cross-platform play when Diablo 3 is released on the PS3.
“While we think cross-platform play would be awesome, there are currently no plans to allow connectivity between PlayStation Network and Battle.net (this is pretty standard for most games that have PC and console support). As a result, the characters on your Battle.net account and PlayStation account will also remain separate.”
It would have been cool to be able to upload our elite Paragon super wizards to another platform with cross-platform play, but alas, it won’t happen. Another big question that has yet to be answered is “Will Diablo 3 have an offline mode?” We should find out much more when Blizzard comes to PAX East in March.