My two favourite April 1st jokes on the internet were:
Glock INC bought by Sears and
Google Street Roo - Exploring the outback one bounce at a time.
Brilliant guys, just brilliant.
Oh and at the other end of the scale with have this attempt by JayG ... which I have to say, as much as I *love* him, was just pathetic. I'll be watching to see if he lifts his game next year!