Here's a few from a couple of weekends ago, when I caught up with a photographer friend for an afternoon's wandering round a central city suburb.
Steps to somewhere:

Fancy downpipe attached to a fancy apartment:

Shadows and grills:

All shot with the Sigma DP2M, processed as B&W in Sigma ProPhoto and lightly tweaked in Aperture. I still really love using this camera, in spite of or maybe because of its quirks.