In case you didn't know, Rapidminer 5.0 has been released and there have been some MAJOR changes and improvements to it. It looks a lot easier and appears to be even more powerful. I just downloaded it and plan on playing around with it for a while.
Update: Rapidminer 5.0 is beautiful, just simply beautiful! The have a new GUI that is to die for and a simple drag and drop for your data imports. With all these changes, all my tutorials will need to be completely updated... (hint, hint)