Me too! I don't like it, but it does remind me of Easter egg dyeing.

We used it for cleaning the wood floors of our apartment. Not that it did a whole lot of good (the floors were in desperate need of refinishing). My mom suggested boiling a pot with vinegar to get burned on milk and potato off it. It took a few cycles of boiling and scrubbing, but it worked better than just soaking it.
It's also good for fixing dyes to wool--I'm thinking specifically of food coloring, no mordant needed. I've done it with Kool-aid, but not with vinegar+food coloring. I think I need to try it, just to make sure.
(Okay, so not too many people here will understand my yarn fixation, but I'm sure some will.)