I have one of them..I was going to get any cheap $20 motherboard..but then I stumbled upon the duallies..and my eyes lit up..
I have a P3C-D right now, and am VERY happy with it, I do have one problem though: It doesn't like to adjust the date/time through ANY OS..its weird, have to do it through the Bios, but tha's fine with me.
My mobo handles Slot 1 P2 all the way upto P3 1ghz...two of them!!!
Also it uses PC800 Rambus to increase performance, but you can use PC133/PC100 with a riser card ($7).
This mobo comes in higher models with integrated U160 controllers(since it is a server/workstation board).but I wouldn't go for those.
This mobo new is $130 or so..I got mine "as-is" on Ebay..for $36..and it didn't work at first..only would work with a PCI video card..and then I got it to work with an AGP, I think I cleared the CMOS, but I can't remember.
I'm running a single P2 400 right now..I can beat a P3 500mhz with a little OCing on this board, and have a greater memory bandwith than some PC2100 chipsets.
But there will probably be one bad thing once you get this board, you'll probably end up ditching ur faster systems because this one is so nice!!
my P4 isn't touched anymore..
and it has Radeon 8500 and all..
oh yeah, this also has AGP 4x PRO.
I give it a rating of 95% since it didn't talk to me or anything extrordinary..lol but definetely get it if u can afford it, u can upgrade later to P3 1ghz..
And you don't need to use 2 processors, they have cards that u put in the other slot(s)