Three months ago version 2.0 of Monitoring Plugins was released. Since then many changes were integrated. You can find a quick overview in the upstream NEWS.
Now it's time to move forward and a new release is expected soon. It would be very welcome if you could give the latest source snapshot a try.
You also can give the Debian packages a go and grab them from my 'unstable' and 'wheezy-backports' repositories at http://ftp.cyconet.org/. Right after the stable release, the new packages will be uploaded into Debian unstable. The whole packaging changes can be observed in the changelog.
Feedback is very appreciated via Issue tracker or the Monitoring Plugins Development Mailinglist.
Update: The official call for testing is available.