Yeah, i don't think upgrading from SB to IB is that that much of a point unless you have good use for the revamped integrated graphics or (maybe) better overclocking or you are struggling with thermal issues. Because besides that the only thing that will change is some minor IPC optimizations to the cores (in the range of 6-8% better performance per clock).
Curious about the boards aswell. And the delay of the actual CPUs is luckily not an issue for me, as i tend to take quite some time on deciding for "the board".