I found some flavored vinegars at Harry's (Whole Foods Inc) Market yesterday. I bought the black fig...'pear' looked good also, as did the 'blood orange'. There were expensive...about $7.00 per bottle, but if you order thru Fuhrman they are about $10.00. No oil, so calories are about 6 per tablespoon.
I have a couple favorites by Ken....Lite North Italian, Lite Caesar and my all time favorite....Lite Sun Dried Tomato Vinaigrette. Agh...all of these have some oil and about 25 to 30 calories per tablespoon...so I need to stop using them at some point. But right now I am weening myself slowly. I use less of them and mix them with balsamic and now the Fig vinegars.
Like Mike mentioned, there are some recipes for dressings in the ETL book and I need to try them as well.