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I never heard of "pan", but it sounds like it's for accessing Usenet NNTP newsgroups (e.g. comp.software.macintosh or microsoft.public.mac.office) rather than an RSS. In which case your ISP may provide one (or use msnews.microsoft.com for a small selection of MS-oriented groups.)
and if you really just want nntp, i recommend going through the web, using groups.google.com. i used to be a hardcore mt-newswatcher (and newswatcher before that) fan back in the day -- my first usenet post is in september 1996! -- but deja-news, which morphed into google groups, is the way to go imo.