The recently-revived X-Ray magazine, a bimonthly devoted to all things Quark and QuarkXPress, has a pretty good deal going, and if you are interested in QuarkXPress 7, you should really get in on this.
Go to this link:
and fill in the form. The next four issues will come to you for nuttin'.
I recieve X-Ray and I recommend it whether you are a die-hard Quarker or an InDesigner who wants to see what "the other guys" are up to. It's well-designed, informative, and right now it's the most credible source for information on XPress 7 outside of Quark itself.
A full year costs about $6 the issue, so it's a very good deal too.