Moving on from my earlier work on mapping migration with flow maps, I've now begun to think about mapping commuting. So, rather than look at residential mobility I'm focusing on labour market dynamics. Actually, I find this more interesting and there has been some good work on this recently - for example, by Nielsen and Hovgesen in 2005 and 2008.
Even more recently than this (May 2009), Killer and Axhausen of ETH in Zurich produced a paper on Mapping Overlapping Commuting Areas. It is very interesting and even mentions my 2009 paper on flow mapping (though I wrote about migration and not commuting)!
So, a new flow-mapping-related project is in the works... Look out for more in the future.