Easiest way to get "the desktop cube" (which you can distort into a globe as I have), i.e., Compiz Fusion installed is just to type this into a terminal:
sudo apt-get install compizconfig-settings-manager
There are other ways to do it too though.
I didn't bother transferring my own bookmarks. I only had about 5. But to transfer my wife's, who was using IE on Windows, I ended up just exporting them to HTML in IE on Windows, and imported from the HTML in Firefox on Ubuntu. No problem.
You might be interested in this "to do list" of things to install, etc.:
http://theindexer.wordpress.com/2009...nty-jackalope/
Should be taken with a grain of salt though, since some of that stuff comes preinstalled anyway, and a lot of it I skipped if I wasn't interested in it personally, including the first thing. Just going into "Software Sources" under System > Admin and checking all the boxes was enough for me. (Other sources can be added on the fly if need be.)