Seems like a mixed bag
I was going to get Expedition to the Demonweb Pits, but after reading about the Cambion fiasco, now I'm not so sure.
I might get Drow of the Underdark, but honestly, I was very satisfied with GR's Plot & Poison. I rather doubt DotU will pack anything close to that kind of bang for the buck, but the jury is still out.
Ruins of the Wild is definitely on my list, although I use counters rather than miniatures, because I'm not made out of money and I object to WotC's collectible profit squeezing. Ditto for City of Peril.
Complete Champion is a must for me. I've generally found the Complete series to be above par.
The Sinister Spire is also on my list, as I enjoyed Barrow of the Forgotten King, even if it required a little tweaking to make it less linear. Looking forward to this one.
I'll probably skip Expedition to Undermountain. Oversized dungeons tend to become monotonous after a few months of play, and the original Ruins of Undermountain didn't exactly blow me away.
I have no interest in Eberron, although I bear it no particular hostility either. It is a well written, well designed world, but it just doesn't press my buttons.
But I sure could've used that trapmaking kobold a few months ago when my Hackmaster group descended into the kobold lair of the Mines of Chaos (We're still working our way through Little Keep on the Borderlands). The Frost Giant Jarl is supercool too, but not cool enough to make me start buying WotC miniatures.