Google Wave beta invites have been sent out recently to much excitement from the digerati. However it wasn't quite so fun for some, spare a moment to pity poor Iain Tait after a Twitter prank went a bit wrong, or right, depending on your point of view. It seems to be an incredibly advanced communication tool. Here's a link to a very long explanation (1hr 20mins). However, below is a much shorter video of Google product managers explaining it in about 8 mins.

Below is an animation from the digital buzz blog to explain a small bit of what Wave can do. Created no doubt to blag an invite.