I believe that device is supported by the b43 driver. Try running "lspci -vnn | grep 14e4" to see if the device is listed. If it is, you probably just need to install the proper firmware.
For more info, visit
this page at Linux Wireless.
edit...
(The card's not necessarily supported just because the PCI-ID begins with 14e4. In this case I was already sure that the last 4 digits would be 4318. You have to check the table on the Linux Wireless page for each particular chipset.)