Create a maven 2 pom plugin

I would like to create a plugin that can read and rewrite the pom.
This could be used for things like:

• sorting and cleaning up dependencies (included in the patch)
• resolving plugin versions and adding the version numbers to the pom
• look for missing configuration like the scm or license and give a warning for the stuff that's missing
• general validation or other pom related tasks?

Since there appears to be no maven pom plugin for maven 2, maybe this can be the new maven pom plugin.