The last couple of days I have tried to get the Montana map into a better shape: I have connected the unconnected road segments across county borders and removed duplicated ways that ran in parallel to county borders; both apparently artefacts of the TIGER import. For a few small areas I have also reviewed some of the TIGER imported roads using yahoo aerial images; unfortunately the imported data has only a remote similarity with the imagery, so that is going to be a lot of work. Is anyone else working on the Montana map at the moment?