It's not possible at all. I can tell you for sure that the servers are totally different and the servers that host PSN and Xbox Live won't connect with each other due to PSN and Xbox Live being totally different consoles and companies. For example on the PS3 you can only connect with people using PSN so they must have to have a PS3. The EA ID is only for tracking stats that can be viewed online. As the comment above says it will only ever be Xbox > PC or PS3 > PC.
Best Answer
Up to three controllers work fine, but the game crashes with the fourth one. It seems that the game does not support four controllers.