I don't about the optional WWAN card (cellular internet). But I think everything else will work out of the box on any current version of Ubuntu, except for WiFi.
To get WiFi working, you need to install the drivers after installing Ubuntu. I think the easiest way is to connect to the Internet via a wire, then open up a terminal and run *:
sudo apt-get update && sudo apt-get install bcmwl-kernel-source
Then reboot (not required, but makes it easier).
There are other methods, too. See this page with info about Broadcom WiFi on Ubuntu
* This command uses "apt-get", a common, low-level program for managing software packages on Debian and related Linux distros (like Ubuntu). "sudo" runs it with admin privileges. "update" tells it to check with the servers for new software. "install bcmwl-kernel-source" tells it to install the Broadcom WiFi driver. "&&" means only run the second command if the first succeeded.