The group I play with are still using 3ed, everyone's happy with the version and we're all agreed that the costs aren't worth it. We'll probably switch when there's a proper upgrade though.
I've cut down on buying Wizards books unless they REALLY catch my eye. It seems that these days it takes at least four books to cover a topic that one did in 1st Ed.
I've just cancelled by subscription after putting it off for at least a year. It was hard to do as I've been getting Dragon since issue #80 but enough is enough - I was skimming through then putting on the shelf. Apart from a half-dozen or so articles since 3ed started (not incuding new...