Not long ago, we broke the news that Google has started sending invites for Google Wave. The run-up to the launch of Google's real-time communication tool has dominated both social media and mainstream media chatter for the last few days. Twitter users have been clamoring for invites (or trying to buy invites on eBay).

So what should you expect when you first get your invite and enter Google Wave? Well we know the answer. Mashable's Jennifer Van Grove is the first member of our team to receive a Google Wave invite. And what was the first thing to greet her as she entered Google's magical wonderland? Why, none other than Google's friendly tutor, Dr. Wave!

When you open up the Wave interface, you will be greeted by Greg, one of Google Wave's product manager. Or, as he is apparently known around the office, "Dr. Wave." He introduces you to Google Wave in a very fun and very informative 2 and a half minute video, which we've embedded below.

Before you watch it though, one note: the video's meant to be watched while within Google Wave. Thus, when you see him pointing, he's supposed to be pointing at the Wave interface. So you might get a bit disoriented. In any case, here's Dr. Wave:









Please: let us know what you think of Dr. Wave and his tutorial in the comments.

BONUS: Extensions Gallery Intro

Here's yet another intro video fro mthe Wave team, this on on Google Wave extensions:









BONUS #2: Google Wave Sudoku Extension

They even demonstrate one of the standard extensions, Sudoku. Who wants to play me tomorrow?