I really like the idea, and the rules look good on paper, but I haven't seen them in play, and probably won't for a while. I'm hoping to incorporate come Eberronisms into my homebrew over time, though. I've been toying with a campaign that would culminate in the party finding an army of inactive warforged constructed by the wizard/artificers of my resident ancient magical empire. Basically, they've been constructed but not yet infused with life. The players would be in need of an army to save their home from invasion, and would have the option of activating a type of Soul Forge to bring the army to life.
Of course, they'll be expecting expendable constructs they can order around, and they'll get intelligent individuals with souls, which should be fun. Though I'll probably drop some hints so they're not completely blindsided if they're paying attention. Luckily, my players are all newbies and none of them collect books, and barring my girlfriend, none of them know anything about Eberron. Otherwise, this would never work as a surprise. Well, my girlfriend won't be surprised, but I imagine I can get her to keep her mouth shut.