When I want to work on Ubuntu, I have my own root server, and I have VirtualBox running on this Mac already. Now, what's more important, some things you'll normally find somewhere in a menu in Gnome, i.e. showing hidden files (files starting with a '.').
Aside from the WiFi fix (which could vanish should Canonical decide to auto-detect and install the right driver there, as it does when you try Ubuntu from the USB directly), and the yet lack of fully tested support for Thunderbolt (mini display port functionality works), Ubuntu looks great on the Mac already. There are some reports about switched key bindings, and problems with the touch pad