I successfully transferred my Windows 7 installation from a WD Green drive to an Intel 160GB SSD by using the Windows 7 "System Image" backup. I backed up to an external HDD and burned a recovery DVD. I then swapped drives, booted from the recovery DVD, and restored the system image to the SSD. Worked great.
The partitions would only end up aligned if they were aligned on the HDD to start with. I did this with the RC version as a test, and then later repartitioned and installed from scratch using the RTM version.
The good news about installing from scratch is that it seems a lot less painful on an SSD because it goes so much faster.