Wow! How nice! Before there is a frost, bring them in and they will ripen inside. You don't have to set them in the sun, contrary to what is said sometimes.
Here is what I found:http://www.weekendgardener.net/vegetable-gardening-tips/green-tomato-090709.htm
"Tomatoes ripen from the bottom up and the inside out, so don't put tomatoes on a windowsill to ripen because they will only turn red, but not ripe. They will stay green inside.
Instead do this:
1. Place your unripened tomatoes on a tray, and then put them in a dark, warm spot
2. Cover them with a single sheet of newspaper
3. These are the conditions tomatoes need to continue the ripening process, which is internal. The light, which was needed for "growth" isn't needed anymore
4. Eat when ready"
at 9:20 PM on Oct. 20, 2009