Copy/Paste does not play well with Gnome desktop on Ubuntu by default. You have to experience a borked copy/paste setup to appreciate how insanely frustrating it is.
Some horse whispering is required in your .emacs file:
(setq x-select-enable-clipboard t)
Thanks to Anders Carlsson for posting how to do this.
What a relief!
On the delight side of the equation, term mode allows me to have colored bash shells in Emacs. Very pretty.