Yay! I got it working!
it was quite simple to fix it as well.
I used this tutorial here, but downloaded the dell R151517.EXE file while in OSX, transfered it to Ubuntu, and installed the ndiswrapper files from the Live CD.
This is what I typed into terminal:
then I added ndiswrapper at the end of the file that opened (and saved), then rebooted and wireless was working!
unzip -a home/nat/Desktop/R151517.EXE -d driver/
sudo ndiswrapper -i bcmwl5.inf
sudo ndiswrapper -l
sudo ndiswrapper -m
sudo modprobe ndiswrapper
sudo gedit /etc/modules