How to add contacts using the robot emaily-wave@appspot.com?

• Goto contacts window. Type "emaily-wave@appspot.com" in the search box.
• You will receive a message "emaily-wave@appspot.com" could not be found in your contacts".
• Now click the contact (emaily-wave@appspot.com)
• Now emaily-wave@appspot.com is added to your contact. emaily-wave@appspot.com is a robot. Using which you can add contacts from your own wave.
• Now click New wave button in inbox.
• Click the "+" button and add emaily-wave@appspot.com to the wave Immediately a text box will open.
• There you can type the contacts (Ex : r.selvakkumar@googlewave.com) and click the Add button. 

For reference click here.