I admit it, I fell for the Firebox one.
Their latest email arrived in my inbox, advertising their newest gadgets, including satnav trainers. I thought they sounded ridiculous – but genuine – until I spotted the powdered beer alongside.
The Guardian’s announcement it was going to convert entirely to Twitter was brilliant.
One of my friends surprised us by changing his Facebook status to ‘married’ for a few hours.
The Metro has a round-up of some of the other April Fools here.
And Time Magazine has some fools from around the world (no, not the G20).