To replace the wireless card in your computer, you should find something on
this list
(http://www.fsf.org/resources/hw/index_html/net/wireless/index_html/cards.html)
and order it online. The one I purchased for my laptop is a D-Link DWA-643
ExpressCard. It works wonderfully. Buy one here:
http://cgi.ebay.com/D-Link-DWA-643-802-11n-Wireless-LAN-ExpressCard-34-Adap-/370381283688?cmd=ViewItem&pt=LH_DefaultDomain_0&hash=item563c71e168
With 3D graphics, the problem is that neither AMD/ATI or NVidia want to
release the source code for the low-level firmware that all the 3D functions
depend on. They're afraid that it will reveal some aspect of their hardware
to the competition, so they key motive for their refusal to release fully
free drivers is risk avoidance. Of the two companies, AMD has been more
willing to work with the free software community. Intel cards, though not
optimized for gaming, have fully free drivesrs.
Your printer will almost certainly work in Trisquel the same as in Ubuntu.
