As we all remember, Google generally have something or the other for April fools day.
I was waiting to see the one for 2008 but what I noticed that this time its not 1 or 2 jokes.

Here is the list of jokes for April 2008

Gmail: Custom time
http://mail.google.com/mail/help/customtime/index.html
Google Calendar: Google Wake Up Kit
http://www.google.com/googlecalendar/new_wakeup.html
Gtalk: Goes green
http://googletalk.blogspot.com/2008/03/google-talk-goes-green.html
Google Virgle
http://www.google.com/virgle/index.html
Google China: Human Search Engine
http://translate.google.com/translate?u=http%3A%2F%2Fwww.google.cn%2Fintl%2Fzh-CN%2Frenrou%2Findex.html&langpair=zhen&hl=en&ie=UTF8
Google search DAJARE
http://translate.google.com/translate?u=http%3A%2F%2Fwww.google.co.jp%2Fintl%2Fja%2Fhelp%2Fsearch%2Fdajare%2F&langpair=jaen&hl=EN&ie=UTF-8
Google Docs
Start or open an existing google doc. Select the file menu and you should see the option for “New Airplane” under “New Document”.
http://docs.google.com/View?docid=dftvhrcj_285ccgzh4tq
Google book search
http://booksearch.blogspot.com/2008/04/google-book-search-now-smells-better.html

That’s all for now, will update with more as I find them (if there are more 😉)

UPDATE:
Google gDay™ with MATE™
http://www.google.com.au/intl/en/gday/
XKCD / qwantz / questionablecontent
http://xckd.com/ & http://www.qwantz.com/ & http://questionablecontent.net/
Youtube
http://www.youtube.com/user/YTRickRollsYou
MetaSploit
http://metasploit.com/
Orkut
is now yogurt 😉 http://rohit11.com/share/outer-court/yogurt.png
More UPDATES:
Google Adsense
http://adsense.blogspot.com/2008/04/introducing-adsense-for-conversations.html
Blogger
http://buzz.blogger.com/2008/04/announcing-google-weblogs-beta.html
Google Calendar
In Google Calendar today, when adding a new event, an extra button labelled “I’m Feeling Lucky” appears. When clicked, it adds a random event at a random date/time on the screen with such descriptions like “Date with Anna Kournikova” or “Date with Angelina Jolie”.