Easy Hadoop via Ensemble
People are talking a lot about Hadoop and Big Data. This is an area where a tool like Ensemble can really help out. Juan Negron has distilled the installation process for Hadoop on Ubuntu into a formula.
Check out the instructions (1,2) that Mark was reading, and then you can see how Mark took all that Hadoop expertise and just used the Ensemble Formula to dramatically simplify the installation.
There is work going on to make the formulas easier to find and share, right now you pull it from a bzr branch, but the project is moving along at a fast rate, you can find out more about Ensemble on cloud.ubuntu.com.