World's Longest Palindrome Sentence?

Anyone looking for a challenge in the same way Norvig was, why not try using some NLP techniques to try and create the longest palindrome that makes sense, at least grammatically. That'd be way cool.

There is in-fact a whole family of Panama palindromes: http://www.fun-with-words.com/palin_panama.html

AFAIK the world's longest palindrome words are 'kuulilennuteetunneliluuk' in Estonian an 'saippuakauppias' in Finnish