After 4 years of compatibility updates, script author Lloyd Alvarez has completely re-programmed how it works, to make it even more easy-to-use and reliable. With the new Basic version you can just render your queue in the background with a click.
[update: Lloyd added more on the AE-List, "The basic version uses low priority to make sure you don't see any performance hits while you continue to work in the foreground. However if the machine is only rendering (ie you are not doing anything else) then the render speed will be the same as if the priority was set to high. What low means is that if there are other processes happening, the cpu will give priority to those over the BG render, but if there isn't anything else going on then the BG render will get full cpu priority."]
The Pro version offer many additional features, including:
- set prefs for the renders
- post render actions which allow you to get "growl" notifications
- send email (with log), send sms and even iPhone push notifications when your renders are done or you have an error
- send a terminal command to be executed after each item in the queue is done rendering and put the machine to sleep or shut it down
- If you are using CS3 or CS4 and have CS5 installed, you can send your CS3 or CS4 render to the CS5 render engine to take advantage of the new 64-bit goodness while keeping your work project in the older version
- a portable app/folder feature that makes it easy to create an ad-hoc render farm quickly by simply copying this portable app to all the machines on your network and just double-clicking it to launch the render on that machine.
For more information on background rendering and notifications, see After Effects render tips, Background rendering with After Effects and AE render notifications: iPhone & beyond at AE Portal.
Here's the overview video: