You are entering a minefield. You probably won't be able to locate a card
with the chipset you need locally. What you want is a card with the rtl8187b
or rtl8187l chipsets. The rtl8187b is what we sell in our 802.11G USB card
and it works very well with Trisquel (and all other distributions for that
matter).
There is also an ar9170 chipset that works with Trisquel now. We sell cards
with this chipset too although aren't going to recommend it unless there is
some reason you really need an 802.11N USB card. It doesn't work as well for
typical users as the rtl8187b chipset.
Here is a link to our store:
[http://libre.thinkpenguin.com/ ThinkPenguin.com]
You would be looking at 6-10 days most likely (outside the United States- 2-3
within).
Check out this
[http://en.wikipedia.org/wiki/Comparison_of_open-source_wireless_drivers
wikipedia article ] for more information. Whatever you do just make sure you
get one where "Non-free firmware required" is no and "Integration in
mainline" is yes.
