I know a lot of you hate the C02. I use both. Carry a couple of C02's, and a mini pump. I hear so many riders complaining that they wasted a C02 because it didn't seal, or something to the like.
I have "The Shiny Object" inflator. VERY small, and as many times as I have used it (so far on other people's bikes), I have never wasted a cartridge.
http://www.ridepdw.com/goods/inflati...bject%E2%84%A2
For the Mini Pump, I use the Topeak RaceRocket HP.
http://www.topeak.com/products/Pumps/racerocket_hp_sl