I posted about saving for a dining room set with coins.

http://norberthaupt.com/2007/11/11/856-in-coins/

This guy has me beat by a long shot:

 http://blogs.moneycentral.msn.com/smartspending/archive/2007/12/24/man-buys-half-ton-pickup-with-half-ton-of-spare-change.aspx?GT1=10827