If you want to get involved with marketing or promoting KDE, it's a good idea to read through the following pieces of information:
A presentation by Sebastian Kügler about KDE Marketing at FOSDEM 2006:
A series of articles by Tom Chance about Guerilla Marketing, SpreadKDE's approach:
The discussions on the kde-artists forum which give some ideas what SpreadKDE is about:
Subscription page of kde-promo the mailinglist for promotional activities, where most of the stuff will be discussed:
Various marketing-related stuff:
Examples of other OSS communities' efforts: