Ok great ... thanks. And just to be clear, I'm going with the "pedsup" design you posted last, for the 100mA capability.
I ordered the parts yesterday, but unfortunately I missed the fact that one transistor is a NAP (BC337) and the other a PNP (BC327), and I had just ordered the BC337 ones. I just placed another order though for mounting hardware, header pins, etc ... so I added some BC327's to it. I also added some 470ohn resistors, just in case it was critical.
I did get the 7-segment display today though, so at least I have something to work on while waiting 