I'm with Debbie on the one whose website hasn't been updated since 2007.

For the others, see if you can find an email address for the editor. If the editor's email address isn't listed, figure out their email format (john.smith@awesomemag.com), and send your query to him/her that way.

Also, check out their media kit. You'll find lots of useful information about the publication there, like the editorial calendar, demographics of their readership, etc.