I just read on Boris Mann's blog that he's announced an "Open Source CMS and Blogging Tools" gathering for Vancouver, BC on February 7-9, 2006, just prior to the "Northern Voice" blogging conference.

...many of the ideas for this summit came about from a presentation by the Joomla guys to the DrupalCon Amsterdam 2005 -- we found we had a lot in common, and many areas of shared interest, from distributed user logins to templating engines. And of course, appearances by Rasmus Lehrndorf of PHP and David Axmark of MySQL just added to the notion that we are part of a larger ecosystem that should be working together more closely.

And they'd like Plone-folk to participate:

I met with Zak Greant on Friday, who is an evangelist working with ez Systems, makers of the ezPublish CMS. Roland is going to be contacting local representatives of the Plone community, like Enfold Systems. Of course, the Drupal community will be here...

Seems like it could be a worthwhile opportunity to reach out and make new friends.