So who went to System Profiler on New MacBook Pros to verify this? Cause if this is the case then this is messed up! 
I was wondering that as well. The AnandTech review of the new MacBook Pros showed an improve battery life that they believed couldn't be completely explained by the bigger battery. It seems unlikely that the slower interface could improve battery life, but I have no idea.
I do hope that Apple fixes this because some SSDs can max out SATA 1.5.
Quick question: Does the white MacBook retain a 3GB/s SATA interface?
The current MacBook has 1.5 or 3.0 ?
WTF Apple. You give us sweet new processor/ram specs then downgrade HDD/SSD performance.
Are you trying to play some kind of psychological warfare on your customers or what? Its shameful that you advertise sweet new specs then go and downgrade something so damn critical.
I suspect its a little scheme so that apple can let some suckers buy them up then shortly after release a quiet update to 'fix' this issue, so that the hardcore mac rumor fans can splash out more cash.
For some reason, windows is showing the interface as SATAII, but you can see performance is hindered quite a bit.
WTF Apple. You give us sweet new processor/ram specs then downgrade HDD/SSD performance.
Are you trying to play some kind of psychological warfare on your customers or what? Its shameful that you advertise sweet new specs then go and downgrade something so damn critical.
I suspect its a little scheme so that apple can let some suckers buy them up then shortly after release a quiet update to 'fix' this issue, so that the hardcore mac rumor fans can splash out more cash.
Very lame.
Well ok for a start moving to SATA 150 looks more like a bug as they would have to disable it on the chipset.
Next up only 4+ disc raid arrays can get close to maxing out SATA 300, SATA 150 is more than enough even for the fastest SSD drives.
Finally its a driver issue most likely as i don't see them installing there own special SATA controller separate to the included one on the chipset. That would not be a cost cutting exercise, it would cost more money to install a separate chip and don't think for a moment Nvidea would make a custom chip for Apple.
Quick question: Does the white MacBook retain a 3GB/s SATA interface?
The current MacBook has 1.5 or 3.0 ?
You guys need to stop complaining about everything
Normal hard drives (especially laptop drives) pretty much never reach these speeds... so the majority of people won't notice.
For SSD, the > 1.5Gb speeds are for read only tests... in real world circumstances the only time you'll notice a significant difference is during boot. Copying large files is limited by the interface at the other end, so no change there, and with normal usage the write time is still rather slow.
As for the comment about wanting to buy a SATA drive in a few years... to be honest, I think now is the wrong time to be thinking about that. Hard drives will change dramatically as SSD is perfected, and the interface will need to be much faster than 3Gb (6Gb is imminent already). And yes the inclusion of 3Gb would mean you have a slightly smaller bottleneck on your end, but there's still a gigantic one at the other.
No SSD for you!
Could the slower interface improve battery life?
Many people with Intel SSD's have noticed their daily activities are noticeably slower. If people are going to dish out $300-800 on these drives, they want to get the best performance possible.
There are also reports that this slower sata bus is increasing battery life.