All 'Puppet Jobs' to target nodes with a class or in a group

Right now there is no easy way to find nodes that have a particular class assigned to it, or is part of a specific group. It would be great if we could not only target node populations in this way via Jobs in the console, but even within PQL.

For instance, if I wanted to run a job on any machine that was in the group 'Windows DB servers' or even just get a list of nodes that would qualify for this criteria via a report or other means it would be helpful.