A few months ago, though never announced on RAILBRICKS, I added two new instructions to my Bricklink shop.  The first two diesels I ever designed, and I think they turned out pretty well.  They are:

ALCO RS2 (9v ready design)

ALCO MRS-1 (unpowered design)

http://www.bricklink.com/store.asp?p=AggieSava

And remember - 10% of all sales are donated to RAILBRICKS!

--Tony