An update from a little research I have done showed users reporting that they got TRIM working for RAID-0 with OROM 11.0.0.1339 and latest RST drivers from Intel.
Seems like the requirement for TRIM to work is OROM > 11.x and IRST > 11.2.
Source -> SSD RAID0 RoundUp 2012: RAID0 strikes back - ( HWBOX ) O/C on first boot
Its a greek site and the reviewer is very reliable. Asus Maximus V Formula with OROM 11.0.01339 and IRST 11.6.0.1030, TRIM is working.
More links:
AnandTech Forums - View Single Post - Trim with Intel RST 11.2/11.5 and RAID 0? Update: Trying 11.5 RST with 11.5.x.x OROM
www.station-drivers.com • Afficher le sujet - ROM: Intel RAID ROMs v11.5/11.6 may open TRIM for RAID0
RAID0 TRIM Another Look
Anyway I'll report back when I get my SSD's and test it myself