Well, the PM's I sent drummed a small response. Here's the updated list.

Not Sent

photomem
seadd
No Digital
pesphoto
joelr
rlibersky

Not Received

photomem
rtbadman
seadd
Thomas Moraitis
photobum
pesphoto
Ektagraphic
mcfactor
paul_c5x4
rlibersky
rst

Again, I think these lists are smaller than indicated here. I have had a couple of responses that prints were sent or received previously.