The Gomadic piece is a ripoff. You can get the same thing without screwing around with the tips off eBay for about $4 or $5 shipped. You can also get them from
http://www.batteryspace.com/index.as...OD&ProdID=2970
Remember that with NiMH- you are dealing with cells that are 1.2+ volts- so you are are right around 5V and no need for a power-robbing voltage regulator (though I am thinking of using 8 AA NiMH cells with one of these high efficiency switching transistors to power my 705:
http://www.dimensionengineering.com/DE-SW050.htm).
I am taking an AC quick charger and a bunch of 2600mAh AA NiMH cells (12 + 2 for the digital camera) on my 7 week bike trip, after doing much research. It was the lightest, smallest, longest lasting solution.
I think. I am still larger capacity NiMH packs made out of C cells and just soldering on the mini-USB connector, but then I would need to go lithium for the camera (or carry another small charger for the camera batteries). I like the AA solution because the recharge times are relatively quick.