Google Hong Kong has a special logo for Li Bai (李白), a famous poet from China. He was known as one of the greatest Chinese poets of the Tang dynasty poetry period.
He was born in 701 and died in 762.
The Google Doodle was inspired from a Chinese artist named Liang Kai who drew a picture of Li Bai Strolling. Here is that picture on Wikipedia.
For more on Li Bai see Wikipedia.
Forum discussion at Google Blogoscoped Forums.