[MetalMan]

The "s" is a measure of the number of cells in series.
You can get loose cells or packs. Maxamps is one of the few companies that cells loose cells. The capacity that Lipos give out is less than what they are rated at. A 3300mah will give out more like 3200mah (unless not pushed hard at all).
There are a multitude of places to buy Lipos. I think they can be shipped by air, but not sure.
They need a charger that can do a CC/CV charging. That stands for Constand Current/Constant Voltage. The charge starts out with constant current, which means that it charges at a constant rate. Once the 4.2v/cell is reached, the charger goes into constant voltage (4.2v/cell), and the charge rate drops off. Once the charge rate gets low enough, the battery is done charging. The Triton isn't a very good Lipo charger since it doesn't fully charge a battery (doesn't go to 4.2v/cell), and it can only go up to 2.5amps for Lipos. The Duratrax Ice is a MUCH better charger than the Triton as long as you don't need to charger more than 10 NiMh/NiCd cells.
You're welcome. :)