Binary ExampleSet Writer and Loader
How about having a binary rapidminer specific format for fast saving and loading of examplesets. I assume that it would be easy to implement using Javas build in serialization functionality. I would also provide a work-around for another problem, which is due to the encoding of the text file when using ExampleSetWriter. I work mostly with unicode text mining and saving an exampleset to a textfile and loading it again sometimes causes problems.