Our experience has been much like that of FIKristen. Our food expenses are down, as we have more time to cook for more (often all) meals. We have to keep an eye on our food budget, because now that all of our socializing happens with friends (most of whom work during the day) instead of some of it happening at an office, it can be easy to eat out in the course of seeing people. If we do go out to eat, though, it's usually at pretty inexpensive places (ramen, etc.).
We had two unexpected sources of income, one consulting gig each for DH and me. This added up to $8,400 pre-tax. This will unfortunately be heavily taxed, due to our combined income from earlier this year and self-employment tax, but not all of it will be taxed, after we claim business expenses.
We have spent money (a few thousand dollars) on travel, but we had savings earmarked for this specifically, so we could travel when not working and watching vacation day limits.
I think we're also saving money because I have time to use up things I already have in the house (fabric, yarn) rather than buy more. I'm also making some Christmas gifts from these existing supplies, which will cut down on gift costs come the holidays.
The other surprise is that I need SO many fewer clothes and other things. I am in PJs into the late morning on many days, and am not wearing the slightly-nicer clothes I used to wear to the office, so I expect I'll be selling and donating even more items. I don't want to be too over zealous: we have a lot less than most folks, and I don't want to get rid of things I wear rarely but still need on occasion, lest I end up purchasing a new replacement item later.
I also have time to chase savings down: watch sales and coupons, argue over fees we shouldn't have been charged, find cheaper or free alternatives, do work ourselves instead of hire someone, etc. When I was working I did not have the mental overhead for that.
And, finally, it is true that you just don't spend when you're not miserable. I used to get occasional massages, facials and cocktails out, or buy a lipstick or some crap, when I had a horrible day at work. And that NEVER happens anymore.