There have been dire warnings about the effect of this loss on US deployment patterns, and the suggestions here have been numerous and expensive. How about the simplest, cheapest alternative? The USS Dallas is due to retire in 2014. Don't retire it. Keep it in service until the next boat is scheduled to stand down, then retire the Dallas, and then the next, etc. Granted, it would mean that we're retaining the least marginally useful ships rather than a proper 688I, but still, it wouldn't be the end of the world. Even re-coring a reactor on a 688 would be cheaper than a complete rebuild of Miami. Finally, if we worked out a way to accelerate construction of a Virginia-class boat further down the line, we'd be able to return to a more desirable force level.
It's not as sexy as an extra brand-new, rush-built boat, or a complete rebuild of Miami into some kind of bizarre 688/774 hybrid, but still, it's workable.