Buffalo buffalo Buffalo buffalo buffalo buffalo Buffalo buffalo
en.wikipedia.org
thats cool
en.wikipedia.org
One of the more extreme examples is a 92-character poem in which every syllable has the sound chi: http://en.wikipedia.org/wiki/Lion-Eating_Poet_in_the_Stone_D...
And also of note to Hacker News, homophone characters are one way social media users evade Chinese keyword filters and censorship: http://en.wikipedia.org/wiki/Homophonic_puns_in_Mandarin_Chi...
It's also one of my favorite demonstrations of how absurd the English language can be. Another good one is "ghoti"[3].
[1] http://en.wikipedia.org/wiki/James_while_John_had_had_had_ha...
[2] http://en.wikipedia.org/wiki/That_that_is_is_that_that_is_no...