Here is the bulletin board I had up during our place value unit. Throughout the course of the unit students brought in newspaper clippings, receipts, ads, junk mail, even a parents' pay stub--ANYTHING with numbers on it--and stapled it to the board! I created a scavenger hunt activity to go along with the board, though I actually didn't get to use it. Feel free to grab a copy of it from my Scribd page! :D
If you use this idea I would love to see your version!