This is a tourist's guide to the area of Patagonia where the Welsh community lives:

http://www.bootsnall.com/cgi-bin/gt/travelstories/sa/may99patag.shtml

And this is an article on the origin of the settlement:

http://www.wm.edu/SO/monitor/fall2000/paper2.htm

(Sorry, I've lost the HTML tricks somewhere) If you search "Patagonia Welsh" in Google you'll find many references.

And this one is an article from Oxford University dealing with the Basque culture and language:

http://www.ehu.es/diaz-noci/Conf/C17.pdf

And finally this one is an excellent site dedicated to Basque music, though in Spanish :

http://www.basque-media.com/index.html

Un abrazo - Andrés