First, we have a Jim Lee Superman Lego Mosaic, made for the 2012 Calgary Expo:
Then we have a Scott Pilgrim Lego Mosaic, also made for the Calgary Expo:
That one's done with a nice, SNOT-ty approach, to allow for greater detail. The predominantly black-and-white color theme, with small colored highlights, also makes for an interesting effect.
Next we have my personal favorite, LEGO Iron Giant, which was recently exhibited at the Endeavor Gallery in Calgary:
And finally, we have a mosaic built on commission for the retirement of SAIT (Southern Alberta Institute of Technology) President Irene Lewis:
Although Dave didn't make it to BrickCon this year, I can see that he's been quite busy creating many fantastic mosaics. Hopefully we'll see some of them in person at BrickCon next year.