As well as the Mayor show, the key vote is over the proportionally allocated seats in the London Assembley, as the fascist British National Party are quite likely to reach the 5% needed for a Member (see Jim J for more on this). Here, a vote for any of the non-fascist parties (and we can probably include Galloway's Respect [sic] in that category) is a vote worth casting. I voted Green in that category, partly to alleviate my guilt at voting for Ken, and partly because I think that it is actually good to have Greens in the Assembly, balancing Ken's/Labour's social agenda with an environmental one.
Later this week, as promised, I will give my recommendations for the Lewisham and Greenwich candidates!
Bonus link: This made me laugh.