Two cool high-speed shift registers:
- 74HC595 - 8-Bit Shift Registers with Output Latches - Datasheet at Futurlec - $0.50 each.
 
- UCN5832 (a bigger version of the 595)
 
Thanks Colin! (PICLIST)
These chips can also be chained to even further increase output lines: 
http://homepages.which.net/~paul.hills/Software/ShiftRegister/ShiftRegister.html
 
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