The iMac and Mac pro lines have both been updated:
Mac Pro
Under the tag line “Mac. To the power of 12.”, the Mac pro line receives better standard graphics; new Solid State Drive (SSD) flash storage options and an option for 12 processing cores!
Available in August. Standard configurations are Quad-Core for $2499 and 8-Code for $3299. The 12 core option is provided by upgrading to two 6-core Intel Xeon X5670 processors.
iMacs
The iMac line receives an upgrade to the Intel Core i3, i5 and i7 processors and a higher performance graphics chip.
The new iMac models are available now.