Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
iPad Hungry Hungry Hippos and Other April Fools for 2012
Here are a couple of the more ambitious pranks floating around the internet today:
Hungry Hungry Hippos for iPad
ThinkGeek has introduced a modernized version of the classic Hungry Hungry Hippos game for the iPad, but now with "capacitive-padded heads."
Electronic Hungry Hungry Hippos iPad Game is everything you remember about HHH. All four hippos are present and hungry, except this time, the hippos fit over your iPad and the game board is an app!
Google Maps for NES
Google has created an 8-bit version of Google Maps for the NES platform - a cartridge based game console from the 1980s.
You can explore it yourself on Google's maps site.