As you all probably know, the NXT firmware does not have built-in support for non-integer numbers. I’ve built an NXT-G block which allows working with non-integers using “fixed-point” representation. I did not have time to thoroughly test and document the block as I plan to before an official release. If you like to get this block for testing and review email me guy@nxtasy.org.

UPDATE: Here’s a nice written review and code samples by Louise Dade.