Here is a good link about this syndrome with an international list of support.
http://www.udel.edu/bkirby/asperger/
It mentions hyperplexia as a linkable word in the "what is it" link in the main page side column. I found it very interesting that the two are very similar.
Good luck.
Karen N38496.9386458333thank you for your help.....ill check it outmy son is 21 and is now going through yet another diognosis.......asberges syndrom......is there a conection. im from new zealand and we are just not able to get the help we need its been years of battle,any information will be gratefully accepted.