Hi, I'm in CT and yes I too had a longer than expected wait for mine. That was back in early 2009. But when I got it, unbridled joy & excitement filled my veins, lol.
My suggestion, remember that you've bought the best table on the planet. Diamond places a premium on customer satisfaction with the install (which likely is at least part of the reason for the delay). They are not going to sacrifice quality & customer satisfaction for the sake of banging out x amount of additional installs a week. Take comfort in that. It makes sense too, because if you've ordered a Diamond, you know Pool and you know Pool tables. They know you'd notice anything less than perfect.
And let's be honest, the delivery & install (done right) of a Pool table is not like delivering a couch. The techs have to know what they're doing and they need the time to get it right. I imagine there's a limited amount of guys who have the skills to do the job, and even less who are willing to do extended road trips which seems to be how Diamond does things. Limited supply with high quality standards, up against great demand = delays.
And like I said, once you get it, it'll all be worth it. All this being said, I'd keep in regular contact with the factory. I'm sure you're already doing that.
I hope your table comes soon! I also hope you post pics once she's in! -Z-