What would email look like if it were invented today? That's the question Google's engineers think they've answered with Google Wave. So what is Google Wave exactly?
Ashton Kutcher and Ellen Degeneres have more Twitter followers than the entire populations of Ireland, Norway and Panama!
Unless you've been living in the Gobi Desert for the past year, you've probably heard of - and been utterly confused by - Twitter.
So what is it? And what's made it one of the most popular destinations on the web?
