Today is Martin Luther King Jr. Day and many of the search engines, including Google, Yahoo, Ask.com, Live.com, AOL, and others are remembering the day with special logos. Here is a collection of logos from the various search engines in 2009. For last year's collection, see over here.
And us, at the Search Engine Roundtable:
Tomorrow is inauguration day, so expect a batch of additional logos for tomorrow.
Forum discussion at Search Engine Roundtable Forums.