I say, black with white D.
Green looks nice too, as long it's not bright green, reminds me of Teletubbies (shivers). Military green is OK to me, you know, the same green colour on that fat sarge's jacket in Saving Private Ryan.
As for the letter itself, better go with =(eGO)=? (with that little TM), to represent our Organization. Beside, it's sure gonna be eye catching with that letters eGO printed on.
The letters at the back kinda low, IMO, though. A lil' bit higher would just do nicely.
Anyway, I just like the idea of eGO's own hoodie.