There is an old plugin that doesn't quite work the same as it did in 1.0 when it was written, but it has some of the things you are asking for. It probably wouldn't be that hard to update, if you wanted to work on it. You can find it in the subversion repository, under "unported" or "old" or something like that. It won't dynamically update, so "current online visitors" won't work, and probably should be removed, as we are heading the direction of lower load and less processing than the other direction. I have wondered about having a preference that allows administrators whether they want to allow the "dynamic" plugins to work (statistics and google are the only ones I know of). That wouldn't happen until 2.0, if it does happen.