data recovery services are VERY expensive (in the thousands to 10s of thousands range) and they will never guaranty that they work either...they subscribe to the pay and pray model! And usually chances are slim that they will recover any/all of your data. I am sure that they sign non-disclosure agreements as usually they do this type of work for companies that are willing to pay big $$ for recovery, so at least you don't have to worry about that.

FYI, as I mentioned in Bec's thread the other day, RAID 0 is suicide as it offers no redundancy at all and you have twice the chance that one disk will fail causing you to lose all your data. For your next purchase, think RAID 1 (mirroring) or RAID 10 (dual, mirrored RAID0 disk sets). And ALWAYS make sure you are using hardware RAID as software RAID is near impossible to recover.

Good luck!

cheers,
Luke