After playing the alpha, I have to say, I'm really looking forward to online, more than single player actually. I understand though it'll take a lot of testing to get all of the bugs fixed though.
Here's some advice. Ditch mcafe and go with Avira AntiVir. It can be found here: http://www.free-av.com. There is a free version (which works just as fine) and also a paid version which my dad uses. Since using it, I have never been attacked by a virus. And the one threat that could have happened was immediately detected and deleted by the antivirus.
(Sorry if this sounds like a commercial. It's not trying to be. I hate it when other people have problems with other anti-virus software. Norton especially. I cringe at the sound of Norton.)