i still stick with my 939 board just for the sake of the agp slot as i have a All in wonder ATI card that i just dont want to lose. in fact i probably spent more than i should getting a dual core 939 processor rather than going to the am2 platform but you cant teach old dogs new tricks
branduin i took a look at the asus site
ASUSTeK Computer Inc. and your board has i agp slot so it can support a dual monitor card. you wont be able to use both your onboard and a separate video card however.
ozzie some of the most glaring benefits i enjoy going dual monitor is multimedia(movie,tv etc ) on one while i am still able to work at those things i think i need to do.
An AIW card has the added benefit of fading the tv into the background and you can bring it up when the important stuff is on (like buffalos first round pick)
Also ever done a tutorial or used ebooks for how to do something? excellent if you have the application on one monitor and the instructions on the other.
My favourite one i think though is using my outlook.. the main outlook is on monitor one but when i open an email it opens on monitor 2. Some tweaking with apps makes things a lot more easier to utilize them on a dual screen.
if a third monitor is required or desired a pci video card(not pci express) can be added.
There is also this product which may work on your onboard video made by matrox. we dont hear a lot about matrox lately but they were the first to bring out dual video cards back when there were only pci slots to use.
Matrox Graphics - GXM - Products - TripleHead2Go Analog Edition