material "Discover Ubuntu" needs improvement

"Discover Ubuntu" is a brochure that is by far our most popular material. It was originally made by an ubuntu-fr (French) team, and was translated into English. It's a great brochure and covers some great topics, but it needs a little bit of improvement.

It does not need an overhaul, and should only require minor cosmetic changes.

 * Some of the phrasing is funny and has some unnecessary words. It mostly just needs cleanup.
 * The color scheme leaves a little to be desired. Solid orange, red, yellow, and green is not easy on the eyes.
 * A better PDF export. The current one has some oddities, especially noticeable if you highlight text.

The source is available in ODT files and a scribus file. I don't know why there are all of those ODT files, it looks like all you need is the sla file.

Overview:
http://spreadubuntu.neomenlo.org/en/material/brochure/discover-ubuntu
Source:
http://spreadubuntu.neomenlo.org/files/source/sourcesdiscoverubuntu3_2.zip
French Source:
http://spreadubuntu.neomenlo.org/files/source/decouvrez-ubuntu-9-04.zip

Post your modifications as attachments here, and once it looks finalized, I'll replace the existing English one.