^According to the project director, yes we can.
Just about to try out the MP now. I suspect the inability to pause combat to select abilities is really going to trip me up!
 Just finished a two or three hour MP session and I'm surprised by two things; 1) I didn't suck at it and 2) I totally lost track of time. Seriously, I'm not usually a MP gamer but I can see myself getting hooked on this.
The only thing that's missing is a way to communicate with squadmates (without a microphone.) Something simple like the command wheel in the Left 4 Dead games should work quite nicely.