I don't know of any specific site. The best way I know of
is to grab *.deb files from the (unsupported) debian site,
http://www.debian.org
The other way is to phyically move your PC to a friend's
house, who has fast connection, and download everything
you want via XN.
Sheng-Chieh
p.s. Make sure you have gcc if you download *.tar.gz and
zip files that needs to be executed. Xandros really ought to
include gcc in their main package. I've seen too many others
have problems here.
Sheng-Chieh