I have had similar situations before. They SHOULD be ok to near freezing, but may have leaf damage if close. If the main stems are ok, then they will probably come out of it, but if the temp actually got to freezing, they may not - especially young ones. It also matters how long they were at freezing or so temps. A light freeze/frost for a couple of hours would obviously cause less damage than 32 for 8 hours.

If the main stems still looks normal green and are firm - your probably ok, if the stem starts turning a differnt color (lighter or darker) and getting soft, they may be done for. It may take a couple of days to tell.

Even at that though, if there is enough main stem above ground were more buds can open up, they may still come back. Obviously delayed, but if they're rooted fairly well, they may come back faster than replanting new ones - that would be a personal call as to whether or not to give them another shot or replace them. If this is the case, just cut the damaged/dead part of the main stem off down to "live" stem, but above a bud, and see how they do.

Good luck!

about your freezing tomatoes; I have had the plants frost bitten to the point of looking completely dead only to have them come back as strong as the replanted ones.