You can always use Gmane's web or news interfaces[1] to read the Cygwin mailing lists, which doesn't require subscribing at all. To be able to post while unsubscribed, add your e-mail address to the whitelist[2].
1. http://news.gmane.org/search.php?match=cygwin 2. http://sources.redhat.com/lists.html#archive-archive, question 9.
Good luck.
