...as you can see (for example) here:

http://rubyforge.org/cgi-bin/viewcvs/cgi/viewcvs.cgi/?cvsroot=ai-app-prog

ViewCVS has a bunch of advantages over cvsweb - it's faster, it seems to be more actively maintained, it supports downloading the repository in a tarball (to defeat firewalling). Thanks to various folks who suggested this change.