Yes AMD have ownage over the bang-for-buck arena with their new Athlon II products!
Could all change if Intel drop the prices on the older LGA775 platform but they seem to be resisiting that!
The real incentive about the AM2+/AM3 platform is that the chipsets/motherboards can be had for a very good price, no reason why the savvy shopper couldn't snag a good processor and motherboard for under £100 . .
I'm not talking budget chipsets either, something like the AMD 785G is full fat most good features one would want, good IGP with HDMI/DVI/VGA outputs, PCI-E 2.0 x16 slot for beefy gamers GPU, RAID 0/1/10, eSata etc etc
There is still plenty of life left in the LGA775 platform but personally I've done that to death and I wouldn't recommend it now to anyone *if* buying new . . . . if you can pickup some used LGA775 goodies that will also get you a nice tasty budget system!