In Short, should be able to run any modern game that exists currently. 

Your processor is pretty good, your RAM is fine. Your Graphics card is a bit aged, but could lilely run D3 at absoluate max graphics. As long as you have a clean system, ie not full of spyware and mallware and other junk, you should run this game max, or very near max if there is any lag at all.

I for one am excited about this game. I believe that the online element can add a lot to this type of game. Clearly, this is not an mmo (thank god) but a coop rpg. Why is this good? Because Dungeons and Dragons was MEANT to be played cooperative with other real people. 

Ie, this game is like playing a real bout of D&D via computer. I personally dont play tabletop D&D since I dont know anyone who would, nor do I have time. I have however played possibly all D&D games ever made, (yes, even the one on intellivision), and have also enjoyed the single player games immensely. (Who can dislike baldurs gate of NWN2?).

This game will come out and possibly be really good, and then hopefully in the near future Atari also releases a game more like NWN2.

Its more than a HD remake. It has more character(s) and missions. However, baldurs gate was a flawless game, having passable graphics is more than enough for me

I doubt that the integrated intel graphics will be sufficient. Integrated graphics are pretty bad. You might be lucky enough to get it to run on lowest settings. Why not buy yourself a $40 non integrated card that will by hundreds of times more capable since you have enough ram and a decent processor?

Check out amazon or tigerdirect or similar for a card. Make sure it is compatible with your motherboard first though