I don't know how much hacking you can do with beam apart from abusing various ICs. have you been to http://www.solarbotics.net ?
if you haven't, i highly recomemd it, it has some really good hosted sites you may enjoy. (also an EXCELENT referance library) but, if you MUST hack something, try hacking the bio-bug and give it a real analog brain instead of a stupid digital PIC processor.
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