There are alternatives from different networking manufacturers. TRENDnet has one at about 50$:
http://www.trendnet.com/products/proddetail.asp?prod=185_TEW-647GA&cat=76
In Spain: http://www.lhst.es/tew-647ga-adaptador-inalambrico-n-para-consola-de-videojuegos.html
If it's considered advertising, I think a mod will delete this post. I know Belkin has another one, and there should be more brands.







