I'm not making a huge push really for this (yet) but I'll keep dropping a note here and there for it.  I've set up a GOOGLE calendar for the sole purpose of adding comics events to it.  Conventions, book signings, local meetups -- stuff ComixTalk readers would certainly be interested in.  You can see it on the website here; but even better you can add it to your own Google Calendar or subscribe to its RSS feed.  I'm not sure what the best widget for Wordpress is for displaying it on a Wordpress site (which powers a lot of comics sites these days) -- let us know!

Beyond being easy to use and display -- it's easy to collaborate on -- I'm looking for more folks to help add events and maintain this calendar.  Many hands make light work, right?  Let me know if you have events to add to the calendar or better yet, if you're interested in joining up as a co-maintainer of it.  Email (xerexes AT gmail.com) or Tweet (xerexes) me.