There is a new MEPAG report available: DRAFT - Findings of the Mars Forward Lunar Objectives Science Analysis Group (625 Kb MS Word document).

One little thing... on page 8 we find "Rovers on Mars have gotten bogged in low bearing-strength soils which so far have not been encountered on the Moon." Not really true - both Lunokhod 1 and Lunokhod 2 ran into low strength soils and had some mobility issues.

Phil