So I built up my Minty Boost, loaded 2 Duracells, and tested the voltages using my prehistoric analog meter, and outside pins test just below 5 volts; ground to middle pins just under 2V. Before connecting the USB plug, I wired from it to the Vin and ground on my Duemilanove board and got a pwer LED lit. So far so good. I connected the USB plug and tested the same voltages.
Now using a standard USB to "D" style - which works fine from laptop to Arduino for both power and data - I connected the Minty boost to the Arduino. No power LED. Am I doing something stupid here? Cable issues?
Just as an additional data point, I decided to try and see if it would charge and old Google Android phone I have. The second I plugged it in, it went dead - blank. I thought I roasted it, but after removing the battery and re-inserting, it seems like it was not permanently damaged. Not sure what that might suggest.
I can send photos if you suspect I messed up the assembly.