Wong Onn Chee has informed us that a new Meetup.com group has been created for Samba users. From Wong's mail to news.samba.org:

Meet with Locals who use Samba, the Open Source/Free Software suite. Gather to discuss the latest News and Software. Visit http://sambaware.meetup.com/ today!

Visit the link above to get info on existing groups. Or start a local Samba meetup group yourself!