Disk Utility partitions wrong physical drive?

I have two firewire drives... one is daisy-chained to the other. Let's call the one attached directly to my iMac as DiskOne and the drive that's plugged into DiskOne we'll call DiskTwo.
So, I was resizing partitions on DiskTwo using the Disk Utility in Leopard 10.5.2. It's pretty obvious in the interface what physical drive you're on. The resizing of DiskTwo went fine. Looks great.
Afterwards, I then realized that DiskOne had been repartitioned as well. Yikes! 28,000 photos and my iTunes library gone. Poof!
Like I said, the interface in Disk Utility is very clear... I never took action on DiskOne... and yet it's now "empty".
Lesson Learned: Only have one physical drive plugged in/turned on when repartitioning.
I'm optimistic that professional disk recovery will be able to get my files back for me. Didn't use secure erase, nor has anything been written to that drive since.
Just wondering if anyone else has seen this? And if you've "accidentally" partitioned a drive, is there a Apple or third party utility you'd recommend to get those files back?
Thanks!

unfortunately, the nature of this kind of thing is that all directories, file names, and other descriptive info are all gone.
Even if I find my iPhoto library files, they'll be useless as they contain pointers to images files that no longer reside in original directories with their original names.
A data recovery tool just finds every file it can, names it something generic and unique, and in this case, throws all .JPGs in one folder, all .MP4s in another, etc.
Not fun... and reiterates the fact that you really can never be too careful even keeping multiple backups... because even though there's a very high probability that even though all 28,000 photos were found in this case, I'll likely never be whole again b/c I'm gonna hafta sift thru 100,000 recovered .JPGs to attempt to find them. And that's not including the whole out-of-whack iPhoto database that describes files in locations that no longer exist and cannot be recreated.

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