After installing a PNY CS1111 SSD, I started getting occasional hangs in Windows 7. Sometimes shutdown or standby would take way too long, and sometimes a hang would happen during normal use. Often, the hard drive LED would stay on all the time, but the computer would work normally, with no signs of actual constant disk activity. Also, trimcheck 0.7 reported that TRIM isn't working.
I just upgraded Intel Rapid Storage Technology from 188.8.131.527 to 10.8.0.1003. The hard drive LED is behaving properly now, and trimcheck shows that TRIM works. I haven't gotten any hangs, though it hasn't been long enough to be sure.
There are newer versions of Intel Rapid Storage Technology available, but I don't know of any newer versions which work with the ICH9R on this GA-P35-DS3R motherboard.