I drove 465 to Martinsville after work today. The roads weren't the best, but I've seen them much worse. I would imagine road crews will be out all night working, so they should be even better tomorrow. I can't give any info from Martinsville to Bloomington, but I personally wouldn't hesitate to venture out tomorrow.
Don't know on the specific section you mentioned but 37 on the south side of Bloomington is supposedly pretty treacherous right now. Whipping winds making it hard to clear it.
Appreciate the replies. I plan on taking my time and will be driving my trusty subaru outback. That thing is awesome in snow, better than my Grand Cherokee was.