Please give this page a look. It's a Spanish distribution based on Ubuntu, whose main feature is that it gives an easy way to create live USBs.

Basically, you burn a LiveCD and find an option to install the system to an USB:

Then you follow the install wizard and voila! you get a Live USB you can take anywhere and even save changes. Basically, you can take your Ubuntu with you anywhere you go

Wouldn't it be great to have something similar with the official Ubuntu?