To beef up a previous post on found items, I discovered a wealth of links for sites offering an array of cultural detritus and other people's crap:
Found photos: Big Happy Fun House
Sound collage artist listing: Detritus.net
An alarmingly expansive collection of found items, retro-heavy: Swapatorium (be sure to click on the video link for Laffun Head)
The Grocery List Collection: yep, 800 of 'em
Snapshots: Square America
Photos and pop ephemera: Happy Palace
Halloween-related crapola: Old Haunts
X-mas-related junk: Santa and me!
More found photos, organized by year: Time Tales
Whoa people, get a life. I mean, c'mon, don't you have something better to do than live vicariously through other people's garbage? Yeah, me neither.