What does one program LegoMindstorms in?  There are bindings for lots of languages besides the default VisualProgrammingLanguage.

I use NQC (NotQuiteC), home page at http://www.enteract.com/~dbaum/nqc/index.html

In addition, there's a FORTH interpreter (pbForth), 
an operating system (LegOS), and
a Smalltalk package for Dolphin Smalltalk (BotKit).
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It comes with a VisualProgrammingLanguage that will frustrate even the youngest child.  Statements are represented by puzzle pieces that hook together on a 2 dimensional plane.  Pieces can't overlap, which introduces arbitrary limits on program structure.

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More links for this are here: http://www.crynwr.com/lego-robotics/, in particular, the JVM here: http://sourceforge.net/projects/tinyvm

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See: VisualLanguage