Abit and MSI are the only ones seen so far seeing any announcements on quad core ready boards. That leaves out a number of AMD as well as Core 2 Duo model boards. The best way to find that out on any particular make or model board is to go straight to the manufacturer's site for details and specifications seen there. The two articles on Abit and MSI boards can be seen at the links here.
http://www.extremecyborg.com/article.../186478_1.aspx
http://www.channeltimes.com/India/Ne...77289-743.html