I want to make a comment about the importance of cover art for Dungeon.
Some issues of Dungeon appear to have art that is tailored for one of the stories in the issue. i.e. good examples include issue 90, issue 112, and issue 121. Other issues have art which might be related to a story, but is hard to tell (i.e. issue 143).
Blurbs on the cover that obscure the artwork actually reduce my odds of buying Dungeon. In that regard, I think the cover for 112 was perfect. It said what it had to say, nothing more, nothing less.
The cover for 121 depicts a scene that took place before the adventure (i.e. the characters on the cover aren't in the module itself) and that's ok since they are iconic D&D characters. But issue 90 and issue 112 actually depict scenes from the module, and that's ideal.
That being said, occassionally a blurb can create interest. But the 5 new monsters and 7 new spells type of blurbs that you find on Dragon -- nope, don't care for those blurbs.
Give me an illustration of some iconic D&D character or a hot medieval female, or better yet, both. The illustration for the cover of Dungeon 143 was cool, but I could not tell which adventure that character was from.
But the blurbs "Who stole the Mask of Diamond Tears?" or "Foil the Great Train Robbery!" ... ummm, I'm not the target audience for them.
That doesn't mean that those types of adventures don't appeal to me. Just that you are unlikely to describe the adventure that appeals to me in under ten words.
edit: Just as an aside, the illustration on page 28 of issue 143 is awesome for this month's Savage Tide adventure.