Changelogger, a plugin which will show the changelog of that plugin directly on your plugin page, as long as it exists within the plugin readme.txt file. Download it from the WordPress plugin repository.
Remember, if your a plugin developer, please read and use this template for your readme file.

Jeffro
June 21, 2009
That is pretty cool. I guess it saves a couple of clicks and makes the changelog information even more visible than before.
.-= Jeffro´s last blog ..State Of The Word From San Francisco =-.
Austin
June 22, 2009
Yeah, so you know right away whether to click install and update or just ignore it.