What I did last time was that I took the barrel plug cable and soldered it to the usb male cable. Then I get myself samsung galaxy tab original charger and then bamm! Working nicely.
Same, Hack your own cable, pair it up with a decent 2amp+ usb charger.. works fine.
DO NOT TRY TO CHARGE THIS THING OFF YOUR PC, no matter how tempting the idea might be.
Yes a proper USB implementation will have a poly fuse to protect overload.. do you really wanna chance damaging a port or usb controller on your computer?
Smaller 1amp chargers will work but slower, and probably only when the device is sleeping.. However.
I tried once to run off my sisters Iphone 4 charger (the small cube chargers) charger went into thermal protection after about 15mins.. hot as HELL.
My current setup is a old 36watt laptop PSU -> CigSocket -> Car Charger -> hack cord -> 7800
Not the most elequent setup but it cost me a grand total of 1.55 and a bit of time.. and provides all the nice clean power I need.