The Google UK Homepage(google.co.uk) on 20th Nov 2007 displayed this logo:

Drawn by Claire Rammelkamp, a 14-year old, Winner of the “My Future” UK doodle contest for students. According to Google, over sixty-five thousand doodles were created around the theme “My Future”.

The logo is titled “This or this?” and shows two variants of future earth; one destroyed (by global warming, pollution and/ or war), and one alive and green, powered by natural energy. The two “o” letters in the Google logo are formed by these two alternative futures, and the green “l” is a question mark.

There are similar intresting logos designed by other kids here.

Google wishes a Happy Halloween 2007 with this logo on their home page today(October 31st, 2007).

The space race began 50 years ago this week when the U.S.S.R. launched Sputnik I. Today the 50th Anniversary is Celebrated in Google Style by displaying this logo.

October 4, 2007 is the International Sputnik Day, check out the events here.

Here are some Articles in the news for your reading:
Information Week: Sputnik’s 50th Anniversary Recalls Dawn Of Space Age
USA Today: Sputnik’s anniversary raises questions about future of space exploration

Google Celebrates its 9th Birthday by displaying this logo on their home page today(September 28th, 2007).

Google Celebrates Roald Dahl’s Birthday on 13th September 2007.

The Google logo today on the Home Page of Google(Google.com) is dedicated to Roald Dahl who wrote some great stories such as Charlie and the Chocolate Factory, James and the Giant Peach, The BFG, George’s Marvelous Medicine and many other great children’s story books. Some of his books later were made into films. Roald Dahl was born on 13 September 1916 and died on 23 November 1990.

Google Celebrating Earth Day on April 22, 2007

Google wishes a Happy Valentine’s Day - February 14th, 2007

There is a seriously wired thing in this logo. For years, Google designers have been playing with the Letters in the Logo by designing them with different shapes. But if you see this logo closely, you will understand one thing. The Letter “L” in the word google is missing. I’m pretty sure its a mistake they overlooked. Hmm.. they should have corrected it later.

Anyway, I like the chocolate over the berry.

[UPDATE]:

Dennis Hwang the Google Doodler responds about the missing ‘L’ in the logo.

When you look at the logo, you may worry that we forgot our name overnight, skipped a letter, or have decided that “Googe” has a better ring to it. None of the above. I just know that those with true romance and poetry in their soul will see the subtlety immediately. And if you’re feeling grouchy today, may I suggest eating a strawberry.

A very happy Valentine’s Day to everyone!

I don’t get how someone can understand that green stem as an L. Wondering how many people really understand that in the first thought.

Google Wishes a Happy New Year 2007, with this logo on their home page.

Google wishing Season’s Greetings 2006 with this Google Doodle.

Google is honoring painter Edvard Munch (born December 12, 1863) with a special logo showing a rendition of his most famous painting, The Scream (the one which may have inspired the killer’s mask worn in Wes Craven’s Scream movie).

Google UK and Google Canada displays this logo for the Remembrance Day on 11th November, 2006.

Remembrance Day (United Kingdom, Australia, Canada), also known as Poppy Day (South Africa and Malta), and Armistice Day (United Kingdom, New Zealand and many other Commonwealth countries; and the original name of the holiday internationally) is a day to commemorate the sacrifice of veterans and civilians in World War I, World War II, and other wars. It is observed on 11 November to recall the end of World War I on that date in 1918. The observance is specifically dedicated to members of the armed forces who were killed during war, and was created by King George V of the United Kingdom on 7 November 1919 (possibly upon the suggestion of Edward George Honey though Wellesley Tudor Pole, who established two ceremonial periods of remembrance based on events in 1917).

Doodle 4 Google - My Britain ' is a nationwide design competition which was open to the UK’s 10 million school children. Young people were invited to design a Google doodle representing what it means to them to be British today. These are the winning doodles in the 2006 competition.

9-13 years age group and Overall Winner

Katherine Chisnall from South West

4-8 years age group Winner
Jamie Scott from Scotland

14-18 years age group Winner
Elizabeth King from East Midlands

Read more at Google Blog.