I’m a longtime fan of the Urban Sketchers website. Small notebooks aren’t necessarily the only way to do urban sketches, but they’re probably the most practical and frequent tool, so the site offers lots of notebook eye-candy, as well as some great art. Here are a few recent favorites:
The site has also organized an Urban Sketchers Symposium, to be held in Portland, OR, on July 29-31, 2010, with a custom Moleskine to commemorate the event.