There are some options for data recovery, but they're usually either iffy (not guaranteed) or very expensive. If the drive isn't completely dead (for example, clicking and still being detected in BIOS), you could try booting the computer into Windows / Linux from a non-RAID drive or live CD, and seeing if it'll detect the RAID drives. If so, you may be able to recover some data off of them.
Keep in mind that RAID 0 is made only for capacity and performance, not data security. If one of the two drives dies, you lose all of your data.