Not too long ago I was working with my IT on installing Lotus Notes for Ubuntu. The fact that they even had deb file was amazing. Sadly, the targeted architecture was only 32 bit. Doing some Goolging I found a few links with bits and pieces such as this one from IBM but the most help I found was from here.
Following the later link I have put together an installer script using the Lotus Notes deb package file which installs the package and installs the necessary 32 bit libraries. You can find my script on Google Code.
There are still some occasions when the gtk decorator fails. When this happens you loose the ability to move and resize all windows. I know that it has something to do with menus being located on the top Ubuntu bar versus being located on the application window top bar.
The fix is simple for the gtk decorator. Just run the following command:
compiz-decorator
