Switching recently to a solidly urban commute from a rural one, it never ceases to amaze me what's out there just laying on the roads: cash, tools, jewelry, electronics, etc! Trash day can be especially interesting and/or heartbreaking.
Some factors I consider when scavenging by bike:
-- worth of item vs. mass of item, momentum of bike
-- traffic density, position of item on/along roadway
-- environmental, aesthetic concerns
So what are some of your favorite roadside finds? Criteria for scavenging?