R2: check for MP updates
There hasn't been an easy way to check for management pack updates in Operations Manager 2007 until the R2 release. Once you're running R2, you can use the Import Management Packs wizard to determine if any of the MPs you are running have had an update released. Just follow the instructions on How to Import a Management Pack, and in step 4, be sure to select Updates available for management packs that are already imported on this computer.