I look forward to learning more about your success, Chic Rustler. The small and microscopic critters will continue to break down your organic layers. I think it shouldn't be too long before you've got the earthworms you've been wanting to invite.
I think you said you have some creature eating the worms by you though? I'd be curious to see what happens if you start introducing some worms to the garden, just on a small scale for starters. You may have enough good topsoil by now to keep them happy. I find earthworms in my woodpile all the time, so they can't be too fussy! Gosh, I wish I could ship you a box full.