Dont throw away your old DDR and AGP card just yet.....
If like me all your machines are dated like Socket A / AGP and plain old DDR then this could a big hit without shelling out a fortune buying PCI Express graphics cards / DDR2 memory.
Yes this is not pretty and chipset mixing will lose u a little performance /zero overclocking potential but is certainly something you could do if you're on a budget or just want to test the Dual Core Platform.
Prices off ebuyer...
E6300 - £117.50 inc (Good overclocker which you can keep for later when you get proper hardware)
E6400 - £153.94 inc
http://www.legitreviews.com/article/377/14/
ASRock 775DUAL-VSTA SKT 775 - £38.58 inc (it doesnt have firewire though

) but a good search around will prolly reap a good few better boards in the pricerange or maybe even at the £30 mark