[Marketing] A couple material updates

[Tyler Mitchell (OSGeo)]

Just an FYI - I've just got the main OSGeo Brochure updated with our latest 
project stack, and have a bunch being printed for FOSS4G.  I also made up a 
(very simple) sponsorship thank you page for posting at our events.  I will 
have plenty of these for folks to take copies of at FOSS4G.  For printing at a 
later date, you can find them in SVN:

http://svn.osgeo.org/osgeo/marketing/flyer/sponsors
http://svn.osgeo.org/osgeo/marketing/brochures/two-side-colour-2010/