YUM Rollbacks?

Dear lazy web,

I’m looking for a easy way to rollback the last installation with yum (included dependencies, of course).

Let’s see a use case:

1. Install something: yum install erlang.
2. That will result in the installation of erlang and three dependencies (tcl, tk and unixODBC).
3. Then do some stuff, and later uninstall those packages (all of them, including the dependencies).

It would be great to have a yum command to do this (yum rollback?).

I’m thinking about programming a little plugin to do it, but first I want to be sure I’m not missing something. Don’t be shy and share you knowledge in the comments!