LiteRumble
The current RumbleStats requires a version, so it wouldn't quite be a drop-in that would keep the rating for the current version on a bot page without some changes to RumbleStats first. But I do love the idea of having such a thing. It could be a good task for a wiki bot instead of pinging the server on every page view. I've already got something monitoring changes in the rumble, so maybe at the same time it tweets, it could check for a wiki page with the bot name, and if it has a special tag, or any RumbleStats tag, replace it with the RumbleStats for the new version.
We'd have to make an initial pass first for existing bots. That could possibly also be aided by a wiki bot. Like for every bot in the rumble, check if it has a wiki page by the same name, with an info box and no RumbleStats tag. If all those things are true, put the RumbleStats somewhere in the info box. (Just trying to be conservative about screwing things up.)