http://elaura.tumblr.com/post/8689849492/installing-lion-on-a-raid-volume
http://reviews.cnet.com/8301-13727_7-20084953-263/raid-and-lions-filevault-disk- encryption-do-not-mix/
I finally did it, I now have Lion installed on my RAID 0 (two 500GB seagate SSD/HD hybrid drives).
What I did was sort of a combination of the two links I posted.
I Used a Lion recovery disk (USB drive), choose Disk Utilty first to create a fresh new RAID 0 set.
Choose "install Lion" on to the Raid 0 partition, then wait till it download from apple.
After it finished downloading stuff, It restarted and showing installing screen, wait about 33 minutes.
I ran into trouble the first time after about 10 minutes, it just restarted itself and stuck on that installing screen.
But this time I guess the version it download directly from apple is a different build, after it finished installing, it sucessfully install a fresh copy of Lion on my Raid 0.
I did a transfer from my time machine backup (Snow Leopard 10.6.8) and it's perfectly working now.
Only one thing I found strange is that when I open disk utilty now in LION, it won't let me do any permission repair/verify on the RAID 0 (which is the startup drive).
Another thing I found interesting is apparently when you do a internet recovery (install freshly direct download from apple using the recovery disk), it's not 10.7, it's the latest version which is 10.7.1
Hope this help