I have to say...I've mentioned Rosco's before but I had two great dogs there today...I highly recommend them:
Die Fleider Dog....snappy dog in a grilled NE Style bun with horseradish mustard, cheese and saurkraut...mmmm
CC Rider which has chili-meaty sauce, mustard and cheese...also awesome. There's a container of Tipitina (something like that) sauce that is excellent on the CC Rider.
check them out...
they're on Franklin Ave in the South End of Hartford...but I hear they're moving downtown...rumor has it near Pratt Street.