MTI MicroFuel Cells has a nifty little slab called Mobion, which uses
methanol to store up lots of juice. You can charge your phone ten times
from one Mobion charge. They project shipping very soon, but are
running short on capital. Looks like there's a chance of additional
funding from, or a buyout by, Samsung.
Check out MTI's page on the Mobion here.
Let's hope this tech gets a chance in the market soon.