The news from the Mars Lander expedition gets more exciting every day. Picked this up over on the BBC - analysis of a Martian soil sample has shown that it is not the highly acidic stuff scientists were expecting. It is alkaline, and indeed appears to have traces of magnesium, potassium, sodium and other elements - much as you might find in your own garden. "You might be able to grow asparagus in it really well" said Sam Kounaves, the project's lead chemist.
You can keep up-to-date with the mission on the Nasa site.