http://www.seanet.com/Users/warlock/
This is the place to start if you're thinking about attending a science fiction convention in the Pacific Northwest, or in a lot of other places, as well. The con listings are updated frequently, but the resources don't stop at conventions. Science Fiction Conventions Northwest serves as a massive meta-index for the science fiction writer or fan, and while the resources listed center around Washington State, conventions from around the world are listed, and indices of sci-fi Organizations, Writers' Groups and 'Everything Else' are provided. If you have even a passing interest in Science Fiction, then you'll want to check out this fabulous resource maintained by John. J Beslanwitch.