There have been some older threads with people doing DIY pint glass etching (http://www.homebrewtalk.com/f51/diy-pint-glass-etching-174513/
). Haven't seen anyone doing it on the bottles though.
I've never tried to do any acid etching so I'm pretty clueless, but how well do you think this would show up on dark colored glass? Sometimes it can be tricky to see on a clear glass unless you hold it right, so do you think it would be visible on a bottle?