Just wanted to chime in and share my experience with this issue so far.
Ever since I updated the firmware, my OCZ Summit 120GB SSD no longer works in my 15" June 2009 Macbook Pro. Whenever I install it and then try to install OSX, I can never make it through the installation. BUT, if I take it out, put it in my external enclosure, and proceed to do the install via USB, it installs flawlessly. If I then try to boot it up via USB, it works just fine. But, reinserting it into the Macbook and trying to boot up always fails.
So, it seems like people's hard drives have not been "fried" (as some people have mentioned before). It just seems that Apple made some sort of mistake with the firmware where the SATA controller can no longer connect properly with some hard drives.
The one perplexing thing is that my friend has the same hard drive installed on his June 2009 13" Macbook Pro and he has not had any issues. Different hardware? Just random occurrences? Any opinions on this?
I think we need to let Apple hear about this just as we did when they downgraded the SATA to 1.5. Email Phil Schiller, Steve Jobs, leave feedback at
http://www.apple.com/feedback/macbookpro.html. Let's be heard to make sure that these issues are fixed!