Multiplayer info is 'coming soon' but I have a feeling a GTA V only Asked & Answered (A&A) on the Rockstar Newswire will be dropping soon. In fact the last A&A on the Newswire was actually in late July of last year so I bet you they'll drop another one almost a year after that one. Within the coming weeks to be more precise.
Seriously though and not being ungrateful here or anything but is anyone else sick of just screenshots and artworks? Considering this is Rockstar's largest and most ambitious game it's yet created than you would expect a bit more info than we've gotten thus far. But after all, it's Rockstar so I could understand at some standard. Best in the biz!