who cares ??
That's a great motherboard that will clock a PhII 555BE to the moon. If you need 4 cores snag a Propus Quad or the AMD Phenom II X4 840 -- either of which should also over-clock quite nicely on that motherboard, too.
I have, however, seen anecdotal comments on other web sites where folks seem to feel the new AM3+ motherboards are less likely to unlock than older stuff -- one being an Asus AM3+ motherboard in particular. As far as I know, OEMs still include unlocking features on AM3+, including the 990FX UD3.
I'm trying to decide between that GB motherboard and the Asus 990X. 2 x eSATA 6Gb/s connectors with the onboard 6 x eSATA 6Gb/s has me leaning toward the Giga-Byte.