You will only notice a performance increase if using RAID0 on a desktop if you are working with large files (ie video files, copying/moving etc) and/or unzipping large files regularly...
From my understanding TRIM will operate on Intel SSDs in RAID0 on Win 7, with new firmware update (for SSDs) and ICHxR driver release...
Instead of running 2 x 160GBs SSDs in RAID0, what about 2 x 80GBs SSDs instead...