My bad.  I just came across this site while googling "invisible earbids" last week.  You guys are so friendly here.

Actually they are $24 shipped from from Amazon, green but that is only the trim!   http://www.amazon.com/Skullcandy-Product-Version-Available-S2ASBZ-BG/dp/B0023RRNLW

Phlog,      I work in the same type of environment, and like you quality is no issue because I mainly listen to podcasts.  The Skullcandy Asyum is a very discreet earbud because the wire goes over the ear and does not just hang down.  I also run the wire under my shirt, so the wire goes...