I've recently purchased a Dell Alienware 17 laptop (http://www.dell.com/de/p/alienware-17/pd.aspx#overrides=n00aw758:6~GTX780;8~75080N) and I've installed Ubuntu 12.04 LTS (kernel = 3.11.0-15) on it. I absolutely need Linux for work (so had to delete the Windows OS that it came with; I tried to do a dual boot, but gave up, but that's another story).

The problem is that the wireless card (Broadcom Corporation BCM4352 802.11ac Wireless Network Adapter (rev 03)) doesn't work in my Linux installation.
 I see that the drivers Dell offers on its website (http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=W49DT) are all for Windows.

Broadcom's Linux drivers (http://www.broadcom.com/support/802.11/linux_sta.php) are only for the BCM4311-, BCM4312-, BCM4313-, BCM4321-, BCM4322-, BCM43224-, and BCM43225-, BCM43227- and BCM43228-based hardware (and not for the BCM4352 hardware that I have) and supported till kernel 3.8.x (mine is 3.11.0.15).

I notice that Dell now sells Alienware machines with Ubuntu 12.04 LTS on them and must have a driver for this card. Where can I access that and how do I go about installing it?