I recently had a comment on my future planetary probes post about another planned mission to Mars. From the Open Space Exploration Journal:
AMSAT-DL, the German chapter of the international amateur satellite organization AMSAT, is set to prove this in late 2010 to early 2011, when their P5-A probe is to launch from the Earth to begin a year-long voyage towards our closest planetary neighbor, Mars.
If an open source space probe could be made, anyone with money could use the design and send their own probes to other planets. Read more at the Open Space Exploration Journal. Thanks to afeder, who wrote the article. This is very interesting!