Hi again,
so I worked on the text & the design of the advertisement a bit;
you can have a look at what I came up with at
<http://etherpad.wikimedia.org/WLM-2013-advertisement> as well as review
first two design proposals at <tools.wikimedia.pl/~odder/wlm/ad>.
Critique and ideas for improvement are, of course, welcome :-)
-- Tomasz