I'm using a combination of the Living Greyhawk Gazetteer and previous edition supplements and this suits me just fine. In fact, I'd rather not have any official support for the setting at this time. If they change things around as much as they did for the newest version of the Forgotten Realms or to try to make classic Greyhawk appeal to newer gamers, I'd prefer for it to lay fallow.
The beauty of Greyhawk's publishing history is that you can pretty much do just about anything with it, and likely be supported by some form of canon: Greyhawk's continuity is a mess, so picking and choosing elements from different rules editions and eras of the campaign's publishing history is one of my favorite ways to keep the setting fresh.
I think the big problem is its ties to D&D. As a campaign setting it is tied closely to the fate of it's parent IP, D&D, and thus has had to change over time to fit it. So that lead to changes from 3e that started a trend, and now a lot of the "Proper Nouns" from GH can be found in all current D&D.
I think that's part and parcel of the ways that the settings are managed: because in many cases, WotC folks who were writing "for Greyhawk" (in particular the 3.5 era) weren't as familiar with the setting and it's history, so Greyhawk was watered down as a "name dropping" marketing lure in many cases. (I'm talking more specifically after the departure of Erik Mona, Lisa Stevens, James Jacobs, and other folks who are, of course, deeply familiar with Greyhawk).
Secondly, in recent years WoTC hasn't seen GH as something to support. When the RPGA took over handling it I knew things weren't going well. (I fear the same thing will happen with Forgotten Realms).
I thought that the Living Greyhawk support was pretty good, in terms of keeping the setting alive, and many of the folks running the Triads and writing scenarios were long-time fans of the setting. So, I'd truthfully rather see GH (or FR, DL, DS, etc.) in the hands of dedicated fans rather than corporate writers who know far less about the setting and its history.
Truthfully, I'm not even wholly certain what I'm looking for. Is GH something that would sell these days? Does it have a draw that the Realms or Pathfinder doesn't have? If it was updated to 4e, is there a place for all the 4e-isms?
I think that Golarian is, in many ways, a more-modern successor to Greyhawk, since ISTR Erik Mona stating that it was consciously designed to play upon the strengths of Greyhawk, and to leverage the same same core inspirations from S&S fiction.
In terms of what you're looking for: does Greyhawk seem more dead because its stat blocks aren't current to 4.0 (or 3.5 or whatever you're playing)? Or, are you looking for some specific hook/teaser/plot/AP that will draw you in? Or, something else?
