I got the same drive and i have had nothing but problems. I couldn't get it to boot off the drive. Tried installing os x with it in a usb enclosure (which it did, but still wouldn't boot), etc, etc. In the end i gave up, i've just ordered a 115gb ssd drive from owc, and im going to run my large aperture library from an external 500gb 7200 drive. I found with the 320gb 5400rpm boot drive it took ages for it to process any changes to RAW NEF files.
Sorry to hear you had so much trouble. I did it a little more conservatively.
1 - change time machine to back up to 1 TB firewire drive - wait overnight for full 100 gig backup
2 - pop out 160 gig 5400 rpm drive and pop in momentus
3 - insert osx snow leopard dvd and let it install
4 - after initial install, when prompted, pick the backup i just made to the firewire drive for migration
5 - everything went perfectly however i had to delete mail.app's preferences and mail folders and start over, no big real really
6 - trouble free ever since - getting faster and faster as the hybrid drive "learns" the files I use every day and caches them to the ssd.
7 - oh, and I had to "start over" on my time machine backups by renaming the pre-upgrade sparsebundle files. No great loss.
Boot time is less than half what it was before the hybrid drive, not that OS X was ever slow to boot. It's not as instant as my iPad but it makes Windows 7 look like three legged dog trying to climb a sand dune.
I also have carbon copy cloner and ran a backup using CCC but decided against restoring it to the hybrid drive. I wanted something that relied only on Apple software and no third party software. Besides, I didn't want to shell out $30 for a USB to SATA adapter.