I'm fairly sure that's the same wireless card that I've got in my laptop. I
don't use it because I don't have the free firmware, which can be
inconvenient.
I've been considering buying a USB wifi card, when I get the chance someday.
You could check out this webpage:
http://h-node.org/wifi/catalogue/en/1/1/undef/undef/yes/USB/undef/undef
Here are the usual excuses for Intel not being able to release the source
code:
http://lists.fedoraproject.org/pipermail/devel/2008-September/010093.html
And here is a good response to it:
http://lists.fedoraproject.org/pipermail/devel/2008-September/010155.html
I doubt Intel will ever release the source code, simply because most people
don't know or care about these non-free firmware issues.
Good luck with whatever you decide. :)