[davedigerati]

how about Google Buzz?

https://googleblog.blogspot.com/2010/02/introducing-google-b...

[DrFalkyn]

How about Google Wave ?

https://support.google.com/answer/1083134?hl=en

[mgiampapa]

How about Google Orkut?

https://support.google.com/orkut/?hl=en