Buy cheese, fly for free (kottke.org):
This weekend I was handed an opened wheel of processed cheeses by a friend. He said that his brother-in-law had caught wind of a frequent flyer promotion whereby you get 500 miles for each purchase of this cheese wheel and had purchased 75,000 miles for ~$300, which also means he's got more opened cheese wheels than he knows what to do with. The frequent flyer forums and blogs are already on the case. These forums are actually pretty fascinating...there's a lot of free/cheap travel to be had for those with a little time on their hands. This fellow claims to have taken advantage of airline pricing errors to fly 16 flights this year for a total cost of $77.57.