I've gone with the MBA ultimate 13". Great computer. Transfered Fusion 3.1 Windows 7 (32bit) VM from white macbook smoothly. Problem - can't use devices like superdrive, isight etc. VMTools installed OK. Bootcamp drivers seem to be the issue. It thinks I have version 3.1 but I can't find this anywhere so suspect it is not installed. Software updater says should update to 3.2 but as this is incremental it can't install over the missing 3.1. I'm sure there is a solution somewhere... Searching on the web hasn't given any answers as these seem to require a bootcamp partition. I am not using a bootcamp partition (and even if I wanted to, I couldn't as I have partitioned the start up disk and bootcamp needs an unpartitioned disk). I've put this under MBA as it seems to be a problem specific to MBA's.