I'd be the third guy to chime in to vote for a -- triple boot --- release. Windows 7, Linux, and Android all-in-one! That would be awesome. We'd get the best of all worlds as well as the ability to avoid specific pitfalls of each OS! @ My vote is for a triple boot.
well, triple boot would be good but the issues arising from pre-installation would be time consuming. I would suggest a flash drive with the installation of all 3 and a choice at first boot which combination you want.
Purist Windows fans can have a single OS, so can purist Linux and purist Android fans - but the more geeky and/or advanced can have any combination via tick boxes.
Alternately as Windows is the only commercial software and therefore requires a COA sticker that should be pre-installed and the Linux and Android are on a flash drive as add-ons after first bootup.