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If not, I may just have to write one myself :(
Also, another very handy extension that I used was SplitLink, but it is not compatible with Firefox 3. It would split redirects line by line, making it easy to read. Are there any alternatives for Firefox 3?
I'd stick with more traditional tools.
Besides, Google analytics will tell you what you need to know without checking SERPs all the time. When traffic on a keyword goes down you can assume it needs to be looked at.