Since I started commuting on BTWD, I've found a number of things:

Things I picked up:
Snap-On E11 External Torx driver - useless, I have no external torx head fasteners to drive, and the ones they sell at Home Depot are internal.
2 brand-new bungees
Specialized water bottle.

Things I did not pick up:
Lighters, baggies of unknown substances, handgun shell casing, spoons, all sorts of clothing, rubber bungies (mostly pieces), and old bungies.

This selection of items sort of reflects the neighborhood I ride through, unfortunately.