Mike Barnkob posted a really nice project on the ROBOTC forums; a liquid handling robot. I am sure you’ve seen them on most CSI shows; not like this one, however. As you can see from the picture, it’s a fairly large contraption. For additional coolness, he made use of the Firgelli Linear Actuators. The motors are controlled by using two NXTs that communicate through BlueTooth.
Mike’s written a rather nice project journal of sorts where he kept track of his project’s progress. You can read it here: [LINK]. There are plenty of videos and source code snippets to illustrate how it was all put together.
A job well done, I’d say!