I just took a knife skills class at Stock Culinary Goods on Hope St-- it was a fun evening, and helpful. I think they do it monthly. It's sponsored by Urban Greens Co-op, and run by chefs from My Chef Lara, a personal chef service.
It was very thorough, but really geared to beginners, so everyone felt welcome, and everyone learned things. I'm a fairly experienced home cook (twenty-two years of home-cooked meals and food geekery), and I definitely learned some good stuff.
I got some basic reminders of proper knife technique (the hows, the whys, and the why-nots), and learned that I could totally buy a new knife (yay!). Namely, a serrated knife that has a chefs-knife-like curve to it. Super useful for getting through winter squash, sweet potatoes, and corncobs.
If anyone is looking for a quick knife skills brush-up (or introduction), I really recommend this class. One night, a couple hours, lots of good info.