Couple months ago I have made USB mod to this router. For some time now I have struggled with underpowered hub due to limited source of built-in 5V line. I assembled small switching regulator to fit into the case to make stable HDD and 3G modems attached to it.
The story with photos can be found here: http://amichalec.net/2011/12/wr1043nd-power-mod-3g/
cheers,
-andy.