And, quite honestly, it's virtually impossible for 4e stuff to be as anticipated as 3e stuff for us, since 3e heralded our return to the D&D brand (and regular gaming). When we started 3e, we hadn't played a D&D game in years. When we got 4e, we'd been playing weekly for 8 years....so it's naturally a different vibe.
I think this is one of the big reasons for this. When 3e came in, it was, for a lot of people, the "return to Dungeons and Dragons," so each new book WAS something completely new.
Along those lines, I think this is also why 4e is getting a "meh" from a lot of people. We already know how every single one of the new classes and new races will work. There's nothing actually new in the mechanics. There's the powers system rearing its ugly head again, killing all excitement. Oh hey, new at wills that are completely similar to the old ones. Oh wait, this one pushes the enemy back and does damage, instead of just doing damage. And this one is an at will for a swordmage instead of just a regular mage. Huh.
Tome of Battle is STILL hotly talked about and contested between people who love it and people who hate it, and that's because it did something entirely new. That's something that can't happen under the powers system.