According to this leaked slide it seems that there won't be 8-core uni-processor CPUs until Ivy Bridge, but it gives us more of an idea what the next single processor Mac Pro might look like. There will be 8-core Xeons for dual-processor models, though it may be a situation where these have clock speeds a lot lower than 6-core models making them less suitable for workstations and more for servers. So a 16-core Mac Pro, from Apple at least, might be some time away. Although this slide is for the consumer/enthusiast market the UP Xeon processors have mimicked the XE, P2 and P1 categories with just the addition of ECC memory support for many years. The family name for The UP Xeons is E5-1600 and E5-2600 for the DP Xeons. All these processors also have four memory controllers to provide quad-channel memory performance up to 1600MHz. It'll probably be 1333MHz on the lower end and 1600Mhz on the higher, like the current 1066/1333 split you see in today's Mac Pros. Also of note is another refresh of LGA 1366 Xeons coming in Q3. While Mac Pros ship with 2.80x4, 3.20x4 and 3.33x6, the current line up on these three price points is 3.20x4, 3.20x6 and 3.46x6. In Q3 these will be 3.33x4, 3.33x6 and 3.60x6 providing lots of upgrade options for 2010 owners for the future.