Thanks for the link!!
I recently got my GF a seat-bag as a gift so she can carry her own spare tubes and tools (it gets annoying having to lug around 4 spare tubes on my tiny little bag). I'm getting 20 units =) that way she'll be able to carry a couple of cartridges on her own. Interesting how i just spent about the same amount of $$ to get 4 units at the local performance store.. grr
If he would only sell the little microflate Nano Tire/Tube Inflator thingie... =(
grrrr. I'm gonna hate to pay $10s+ for two co2 cartridges just so i can get one of those little threaded pumps.