Great idea. Jeff Garzik was looking for a better mailing list solution than SourceForge, but assuming
there isn't a clearly better solution I think "we" should create a strictly moderated bitcoin-bips@lists.sourceforge list.

Let's stay away from SF.net or any mailman-controlled lists if at all possible. They break DKIM signatures which means they're no longer compatible with Yahoo, all mail from Yahoo users gets spamfoldered immediately. Google Groups gets this right. Perhaps other list operators do too. Groups also has moderation features.