They are lucky to have real potential for a (global?) dust storm coming up! Should be a very good time to look for heavenly lightnings as that thing build up. They picked the landing site because Spirit landed there and discovered local dust devils, hoping to figure out if they are electrically charged.

TGO will answer whether there are methane producing biological processes on Mars or not. Is it 4 years since the first tentative measurement of Methane on Mars was published? It’s a very short time until that question gets answered. I heard that MMX, KAXA’s Mars’ Moons Exploration, will take place in 2024. It is still open if ESA or someone else will contribute a semi-Philly sized lander, which most likely would be a jumping one in that milligravity, or not, but MMX will carry small Hayabusa type landers anyway. At every conjunction from 2012 on wards, Mars will be pounded by science probes that get better and better and complement each other.