I recently purchased a Screen DT-S1045AI and have spent the last five months getting up to speed in both mounting and scanning.
It's a very impressive piece of hardware, both in terms of size and capability.
So now I feel confident that I can offer drum scanning to other photographers.
I can do up to 12" x 18", though the largest I've done so far is 4'x5" sheet film and 6x17 rollfilm.
Max resolution is 8000 DPI and anything over 16384 DPI in either axis can be done via stitching together tiles.
I have tested this out on a 617 frame and the registration of the tiles was sub-pixel accurate.
It puts out the full 16 bit colour depth too.
I'm using calibrated Lacie Electron Blue monitors and the results from recent prints I had done from some scans were spot on.
I've begun to work with colour negatives also and have a workflow developing.
I'm in Sydney Australia, though that shouldn't be much of an issue with film being cheap to send via registered mail.
Anyway just wanted to put this out there for anyone that is interested contact me via PM or email for details firstname.lastname@example.org.
Also if anyone can suggest where else I might post to other photographers I'd appreciate it as I'm just starting out with the scanning service.