MS vs. Google Talk
"Microsoft moved to build its presence in the booming Internet telephony market on Wednesday, purchasing Teleo Inc., a Californian company that lets users make calls from their computers to regular phones." [1]
Timing so close to the launch of Google talk just has to make you wonder how much that played a roll in the decision.
[1] http://www.cnn.com/2005/TECH/internet/08/30/microsoft.reut/index.html