Stephanie Hannon – Product Manager of Google Wave has just sent out an update (tweet) to her followers via twitter confirming that Google has just started sending out invitations for Wave. It will take Google hours before they complete sending out invites to about 100,000 users today.

Google Wave is an online tool for real-time communication and collaboration which was first unveiled at Google I/O conference in May. Wave is basically Google’s attempt at how email would look if it were invented today. Google will officially roll out Wave (Preview) to the first 100,000 users who have signed up for the service through Wave site (http://wave.google.com), to developers who are already enrolled in developer preview program of Wave, and selected paying customers of Google Apps.