Hmm not sure if this is common practice, but I very much like this idea of keeping the camera's index number..
Thanks for the indirect tip, good sir!
Something to keep in mind is that cameras (that I have) start the numbering cycle over at 10,000. I found that I had DSC_0001 in two places, one right below the other in the finder but obviously a year apart, then came two DSC_0002's, etc. Luckily I found out in the first download and started renaming the series each time it kicked over 10,000. DSD-0001, DSE_0001, etc. If you choose to add a descriptor before the camera number, it will help sort correctly. But, if you choose to use the camera number first, even with a descriptor following, it will get messed up in the finder and anything else that sorts them. It's good to be able to rename as you import. Bill