Nothing special here:

Ubuntu iso is at: http://www.ubuntu.com/desktop/get-ubuntu/download

The maker of USB's from isos I used is at:
http://www.pendrivelinux.com/univers...easy-as-1-2-3/

I download the iso first, then fire up the pendrive program.
If you have Broadcom wi-fi, just be patient, the wl driver IS there.