apple will not use arrandale for imacs. They will use lynnfield. If they do not use a quad core in their next imac it would be suicide for the imac.
Why? Lynnfields are much slower than Arrandales. Also Lynnfields are for desktops and Apple haven't used desktop parts in alu iMacs and they draw too much power (45W at least)
Interesting! And when could they use it?
Q1 2010, but Apple won't use them