「META」：Up-votes represent desirable contributions, and down-votes negative contributions. Once one amasses a large corpus of comments, noticing which of one’s comments have been upvoted or down-voted becomes nontrivially difficult. It seems it would be incredibly difficult to code in a feature that helped one find those comments; on the off chance it isn’t, consider it a useful feature.
Use Wei Dai’s script. Use the ‘sort by karma’ feature.