I'm just thinking they made the i5 cause no one was really wanting to dish out the dough for DDR3 RAM. Seeing as how they had to buy a new motherboard for i7 and not be able to re use their favorite DDR2 RAM...
I've been reading lots of enthusiasm for i5s. Lots of older generation Core 2 owners seem to be interested in them. Heck, even I'm interested in them unless AMDs budget line can woo me