Wrapper.py has a stable and development version.
Latest Stable (0.7.6)
Latest Dev Build (0.7.7 #106)
Drop Wrapper.py into your Minecraft server folder, and start Wrapper.py with $ python Wrapper.py
On first run, it will create a wrapper.properties configuration file in your server folder and exit immediately.
Open it up and tweak the settings to your delight.
To install plugins, just drop the .py file into the wrapper-plugins folder.
If the plugin came bundled in a zipped folder, unzip the folder and put the folder into wrapper-plugins. Don't move the .py files out of the folder.