OK so just to follow up here...I am highly unimpressed with the whole dual graphics thing. I ran into some problems streaming netflix. Silverlight was becoming non responsive and talking to both netflix and microsoft found no results. After noticing that DVD and iTunes digital movies were awfully choppy and unsynced with the sounds, I decided I wanted to stand alone graphics card. I decided on a killer deal on newegg for a GeForce GTX 550 Ti. Thing works like a dream!
Here is what makes me so unimpressed with the dual graphics setup though: when I uninstalled the HD6580, I noticed that the on board GPU seemed better. Just for the heck of it, before enabling my new card, I tried running netflix-worked perfectly. Tried playing a DVD...played perfectly. So I am not sure if my dual graphics setup was not running properly but it didn't work for me.
I took the HD6580 and put it in my mom's PC replacing an old GeForce 8600 GT. The card by itself works great, which has left me with my negative impression of the dual graphics mode AMD is putting out there.