Have you blown the drives or the caddies?
Have you tried connecting the drives straight onto you computers IDE and power cables (Switch off first and don't forget to set as master/slave). Do they spin up or are they completely dead?
If they are completely dead then I think you have just learned a valuable lesson about backing up data. I am not even sure that data recovery on a dead drive is possible within most peoples budget. Normal data recovery is used on a drive that works but has become corrupted in some way, or even formatted.
If it wasn\'t for Electricians you would be using your computer by candle light
Athlon 64 3500+
ASUS A8V-E Deluxe Motherboard
2x512MB 400MHz DDR Dual Channel
Gigabyte X800XL - 256MB Mem
Maxtor Y160M0 - 160GB SATA
Maxtor 80GB PATA
Xaser III Case
Win XP Pro SP2
ViewSonic VX924 19\"LCD 4mS(ish)