Still under construction...
I'm still not decided about a kernel mod for additional power management support,
I kept a place for a small 430g in order to manage the charging options but maybe is not necessary.
The coil will be a Vishay IWAS-4832FF-50 and the battery a 1000mAh LiIon. All stacked.
Searching other coils I found this complete RxTx set for only $9.50 but not Qi compliant called "Wireless Power Supply"
from seeed http://www.seeedstudio.com/depot/wireless-power-supply-p-701.html