National Novel Writer's Month

As far as research goes, how much are you doing this month as you write? If something comes up that you can get away with sketching out rather than using detail that requires you to do some slightly in-depth stuff, which do you go for? And what's the oddest thing you've had to research so far for your NaNo, whether it was done this month or before NaNo began?

I did next to no research before this month, so I've been pretty much looking things up as they appear in the story. So far I've had to Google floriology, traditional Italian guitar music, Hungarian and German swear words and the history of Sealand (though the last one turned out to be unneccessary, although still fairly funny). The way in which blood splatters after a stabbing has also cropped up too, although that was less fun to research.

I have a plot (finally), a good set of characters that have been fun to flesh out over the last week or so, and I have most of the structure of the story sorted. There's just one seriously niggly bit that I can't seem to work out anything for- one action that, by the rest of my planning, I've made virtually impossible for the characters involved to accomplish. Trouble is, that act is what the whole story after that hinges on.

So I was wondering. What do you guys do when you run into an immovable plot object like this? I've been working on it for months, and it's not gone away. Should I abandon it and start working on a different ending, or should I keep going and hope inspiration strikes at some point next month? The current options either involve infanticide (or something like it- this is the ending I'm struggling to work out) with the 'good guys' triumphing, or a 1984-esque hopelessness involving world subjugation on the part of the villain.

ETA: The 'good guys' are not your typical good guys. It would not be your usual 'good guys win' scenario- for one thing, the infanticide's on their part, not the villain's. Because I like moral quandries- although I'm considering changing the infanticide to something borderline child abuse.