I don't think they do. As far as I understand it, employees can choose Mac, Goobuntu or Windows (though windows has to be justified b/c of the higher overheard of support). Sounds reasonable to me.

From talking with Thomas before, if I have this correctly, is that Google doesn't allow offsite development. So it seems most Googlers have a desktop for development and an laptop for other things with NO code on it. I may have that wrong, but I'm sure some Googlers here can verify that or not.