My current hit parade. So far this year I've recyled 6 cards and am adding new cards at the rate of one a month. I'm on a card diet now (at 18) since the mint folded (something about the government having bad credit issues).

Chase Amtrak
Chase SWA
Chase Disney
Chase British Airways
Chase Continental
Chase United
AMEX Gold
AMEX Delta
AMEX HHonors
CITI American
CITI Expedia
CITI HHonors
BOA Aeroplan
Local CU Mastercard
USBank LAN
Barclays AirTran
Barclays Frontier
GE Money Bank Old Navy