How do you get into Google Wave?

You need to have an invite from a member already enrolled in order to use Google Wave and then you can simply sign in with your Google account or create a new Google account. Unlike traditional email, you can add a person into a Wave at any point.

What is Google Wave ?

Google Wave is a service from Google that allows you to interact like you would through email but everything is happening as you do it, live. When you start a Wave with someone, if they’re logged in, they’ll see everything
you type, files you share, and etc live, as you do it and they can respond to you instantly. 

What you can do with Google Wave ?
It allows you to create a new discussion header and get many people in on the chat. As you type, they see what you’re saying. As they type, you see what they are saying. It’s more like a real conversation than
static email which is not live.

Advantage of Google Wave ?
Lets you share gadgets, videos, documents, directions, RSVP gadgets and more right into the body of a discussion are much more powerful and collaborative.  In google Wave you can easily archive, star, hide and
highlight Wave archives based on how important they
are.

What makes Google Wave Special ?
Unlike a static mail where you have to struggle to unfold events of the past, Google Wave has a handy playback function that lets you watch your Wave unfold in the order it folded. Hit the Playback button to see who said what and when and who responded to what and when. It’s all very new Wave.

What is a wave?

A wave is equal parts conversation and document - People can
communicate and work together with richly formatted text, photos, videos, maps, and more.

A wave is shared - Any participant can reply anywhere in the message, edit the content and add participants at any point in the process. Then playback lets anyone rewind the wave to see who said what and when.

A wave is live – With live transmission as you type, participants on a wave can have faster conversations, see edits and interact with extensions in real-time.