I downloaded the latest DNBE (though I'm not sure if this is required) and the Release Candidate of WLW 2009. I tested it, found one UI bug in WLW and one overall bug in communication between the two.
If you publish post in the future the date you pass is not sticking. I found the current issue, created an issue for it along with some code to fix it.
So if you, like me, are dying to get your hands on WLW 2009... this fix is a must if you publish ahead of times.
I am moving to 2009 for now, I'll update if I find issues.