I heard a good one about a month ago. There was a long wait to get a clearance out of a releiver of MSP due to weather and we had a line at the end of the runway waiting:

Lear: lear N____ has some info for ya: 5839...2834...2804...3823 Experation 10/09
Tower: Say again?
Lear: Oh, you mean my visa card number isnt going to help speed this up?