Google Buzz understands a little bit of the Textile Markup Language. Here are the markups he found that work:
(*)word(*) = bold
(_)word(_) = italics
(-)word(-) = strikethrough
(--) = em-dash
Note: Use those without the ()
Video Calling See with up to 6 people. Web Video Call Friends who don't have ooVoo can video call you from their Web browser.
Video Chat Room - A simple way to embed a video chat in any website, blog or social network.
Mentioned by Nina Lyulkun via Google Buzz