You might find this wiki page a bit resourceful in your quest for the code name's meanings:
https://wiki.ubuntu.com/DevelopmentCodeNames
Gutsy Gibbon, as I saw it while using Tribe 1 (Which broke after a while ..) has a unified Desktop Appearance panel a.k.a Windows style. Yeah, this means that you can change your themes, pointers and what no via the Desktop-Context-Menu > Appearance option.
And that's just one of what changes are gonna take place, install it now to find out the rest
