Printing in different materials is nice, but not crucial. Getting the software to differentiate between support material and the part, and then to print the support material in something soluble (eg HIPS in limonene or PVA in water) is the really important thing that none of the consumer-level FFF printers have been able to demonstrate. I'm not sure if it's a problem with the software or the hardware, but there must be some reason nobody can do it, although your machine might be an exception.

Andrew Werby
www.computersculpture.com