Thanks everyone for the comments so far! I myself have a love-hate relationship with my card for this round, so I'll keep my comments to myself for now.
A few more to comment on:
I love Eugene's 3D card -- very unique and the effect works well for me!
Fotogys' building interior is really interesting and at first didn't know which way was up! It works either way.
Matt King's "Thimbles" is also not what I was expecting but I like it a lot.
And finally, Ricus' Pampass Grass #8 arrived over the weekend, and it's been great to hold a lith print in my hand again -- I can't imagine doing it for a postcard exchange! But the treatment works well with the subject here, and I like the colour you've achieved as well.