You know how it goes buddy, they announce the release early on, and then push that date back 2-4 months due to "manufacturing issues". Regardless, there's no way that those dual core 1GHz proc's will be even comparable in battery life to our Vibrants unless they make the devices thicker to fit a larger battery. Also, will they have our Super AMOLED screen? Hell no. Samsung said they won't even sell it to other company's until 2012, which I'm sure they'll push back to 2011, but still.
We've still got kick ass devices. The screens, battery life for what it's got inside, storage, RAM, etc etc will allow it to be a major contendor for at least 6 more months (I would estimate that it won't start going out of style for another year or so). It took Apple what, 4 years to get to the point that the iPhone 4 is at now? Our Vibrant kicks the iPhone 4's ass in every way after slightly less than a year of R&D by Samsung. Don't worry, technology doubles every year, and there will always be something new and "better" around the corner. But think of it in terms of how -you- value the device. Dual core 1GHz proc's won't do any good if you don't have the applications to take advantage of that, and I still wouldn't trade my AMOLED screen for a dual core just yet. When my mother in law comes over with her DroidX, I always think, "Damn...that screen looks like crap!". Sorry to you DroidX owners, but the Vibrant's screen is really, REALLY fantastic.
P.s., I'm sure T-Mo and Sprint will have the 2.2 update out on time, as Samsung really wants these GPS issues to be fixed (I'm sure T-Mo and Sprint do too). Don't worry about it. As us homebrewers say, "DWHAHB" which stands for Don't Worry, Have a Home Brew.