There is a limit on how backward compatible things are. Rumor is, Bulldozer is based on totally new architecture so I doubt it will fit on any current mobo. Look at K7 (socket A) and K8 (start with socket 754), and the current K10 is just a beefed up K8

yoongkeen said can order by this week or next week

btw guys...if playing games...usually how many cores will be used ??
example battlefield bad company 2

im waiting anxiously to throw my pentiumD into my rubbish bin~

As for rank, you will have to wait for full reviews first (which includes productivity and gaming benchmarks) When it comes to multi-thread then that depends on the version of Cinebench, the older (32-bit version) favors multiple hardware threads while the newer version favors multiple real cores. Thus pretty much depends on the algorithm, coding and compilers used by the application itself. As for the slower single thread issue, often extra cores sharing the same resources (such as the L3 cache and memory bandwidth) does affect it. A nice example here: AMD Phenom II X2 555 BE - 3.2GHz - 1MB L2 - 6MB L3 ..vs.. AMD Phenom II X4 955 - 3.2GHz - 2MB L2 - 6MB L3 - check the single thread Cinebench results between those two processors (both of them have same clock speed and L3 cache but different number of cores).

AMD Phenom II x6 1090T reviews  I LOVE this processor because it run super cool and easy to reach up to 4ghz !!!