I used ndiswrapper 0.4 to get it working. Here are my steps:

1. Download ndiswrapper 0.4 (I could only get this version working, not really a problem though...)
2. Download the *.exe file for the truemobile 1300 drivers off the dell website.
3. It is best to use a windows machine to get the two driver files you need from exe you just downloaded. You need to look for bcmwl5.sys AND bcmwl5.inf. To get these files, you run the exe and tell it to extract someplace where you can get to. Then when the setup start (not the extraction) just cancel and go find the drivers. They are in a subfolder from where you extracted the files.
4. Copy those two driver files and ndiswrapper 0.4 to your linux machine.
5. Extract ndiswrapper
6. Go into the terminal, log in as root "su -" and browse to the extracted ndiswrapper files.
7. Run "make install" and let it finish
8. Browse to /usr/sbin/ and check to make sure that the program "loadndisdriver" is there. If not, copy from /utils in the ndiswrapper folder.
9. In the terminal run "modprobe ndiswrapper"
10. Run "lspci -n | grep 'Class 0280:' | awk '{print $4}'". You should get something like 14e4:4320. Write that down.
11. Run "loadndisdriver 14e4 4320 /path/to/sys/driver.sys /path/to/inf/driver.inf" Replace 14e4 4320 with what you wrote down.
EXAMPLE (what I run): "loadndiswrapper 14e4 4320 /home/jeff/Documents/bcmwl5.sys /home/jeff/Documents/bcmwl5.inf"
12. Download this FILE .
13. Extract and use "make install" to install. Refer to when you install ndiswrapper for help.
14. Run "iwconfig" and you should see wlan0 at the bottom.
15. Run "iwconfig wlan0 essid YOUR_ESSID"
16. Run "iwconfig" again and look to see if your essid is printed in the printout. If not, turn on the card by using Fn + F2 on the keyboard.

I bought this mini PCI card secondhand.
I did not need any of the steps above, I just installed the hardware behind the lid on the bottom of the machine, booted into Debian and the thing was automatically detected and drivers loaded.
/etc/network/interfaces required some editing to be able to actually connect to the wireless campus network.
Fast transfer speeds! Up to 400kB/sec.

Included with Dell D600. It works, but poorly. I am using ndiswrapper 1.2rc1.

* Since ndiswrapper is the driver, there is no link quality level.

* On WEP APs, the card usually requires cycling of security modes to connect to the AP.

* The card sometimes drops the connection, and freezes when the connection is brought back up.

* The card sometimes works with S3 sleep, but other times it will block on unregister_netdevice.

* Ad-hoc mode rarely works.

* ESSID and AP setting doesn't always work well. Sometimes the ESSID will not set even when wanted ESSID is detected with 'iwlist scan'.

Initially had alot of problems (switched to Linux with no programming knowledge, and minimal command prompt experience) but once i figured out how to install / run ndiswrapper (and had a *very* helpful person on this forum send me the .inf and .sys files from a windows box, which i didnt have access to) everything has gone smoothly for the most part.

I have not tried to connect to any ad-hoc networks, so I can't vouch for the compatability with those, and I only use wireless at free hotspots, so I cannot say anything about the speed of the connection.

I also had a problem with a pervious kernel (2.6.12-1.1372_FC3 i believe) that was very strange; it would not recognize the card no matter what i did [reinstall ndiswrapper, extract + rewrite the module, etc etc etc!] so whenever i was going to use wireless I would boot up the older kernel. Thankfully the kernel i'm running now does not have that problem!