(Video Link)
Today is the most difficult of all days on which to be a Neatorama author because we must attempt to distinguish between the neat real and the neat fake. Confusing hijinks abound on this day, such as the subscription paywall that our friends at Boing Boing instituted (they had me falling for it for about ten seconds).
My favorite prank is Google's new motion-controlled email program, but you can view roundups of some of the best pranks this year at Flavorwire, Technabob, and Urlesque.
http://us.battle.net/wow/en/game/dungeon-helper/
Remind you of anyone? :D
Thinkgeek.com had some great stuff too.
As for what neat things to share on April 1st, go to an amassed backlog of thing from the past that were not shared.