I'd like to request to adopt the TracBacksPlugin if the current maintainer no longer wishes to maintain it. Alternatively, I'd like to request to co-develop the plugin with the current maintainer. :-) I've noticed a couple of comments by the current maintainer from 2010 saying he's no longer using this plugin; I don't know if that's still the case, but if it is I'd be happy to help maintain it since I am using the plugin in several environments.
I'd particularly like to commit the patch described in #9743 -- that bug is currently preventing me from using an unpatched checkout of the plugin in production -- and also implement the suggestion in #6638. I'd also like to get the plugin internationalized, and add a functional test suite which I think would help to develop fixes for several other bugs (#5456, #5457, #6639, #7439) as well as preventing regressions, since there are a couple of fairly complex edge cases that the plugin has to deal with.