After seeing an article on Cheese 3.0 and it's new effects some months back, it was going to be one of the major highlights of 11.04 to me.
Sadly, I find 3.0 is not in the repo; it has been released, just not soon enough before the freeze.
So how do I install Cheese 3.0 in Ubuntu 11.04?
You need GNOME 3 to run Cheese 3.0 while Ubuntu 11.04 has GNOME 2.32. So, what to do?
Wait a few weeks until the GNOME3 PPA has been throughly tested and install GNOME3 alongside to Unity. Then, you can install Cheese 3.0. Instructions at https://launchpad.net/~gnome3-team/+archive/gnome3
NOTE: Do not install the PPA yet. Currently the PPA is experimental, and there is no going back (removing GNOME3 to go back to Unity).
You can download Cheese 3.0.1 from:
Extract the file, click on the extracted file named cheese-3.0.1 then click on the file named INSTALL which tells you how to go about installing Cheese 3.0.1