Some of the stuff looks very cool. You can check out the previews by following this link.
The one I’m probably most interested in is the Heroes of Battle. Sounds like a very cool supplement, providing rules for battlefield conditions. I have the original Battle Systems, and I found it somewhat tedious and clumsy. If they have some pretty good rules for large scale combat, this will be worth the price by itself.
The one I’m probably most skeptical about is the DM’s Guide II. Not sure what this will add, but I’ll have to flip through it at the bookstore and read the Amazon.com reviews before I decide to pick this one up.
If anyone’s had a good campaign on Eberron, drop me a line. I’ve never purchased any of the products because of my near 20 years famiarity with the Realms. I’m interested to hear people’s opinions on it one way or the other.