It is certainly an interesting development which could be attributed to Google's Third attempt to take a Swing at Facebook, simply due to the stir it will no doubt produce which will certainly cause users to start re-thinking their choice over time.
It seems Google have certainly learnt from previous mistakes and with their New data centres and substantial network through to selective testing before release, as well as improving on many of the annoyances of other Social networks as well as adding something new.
MySpace certainly has s a lot of work to do to keep up with what is set to become an interesting battle of the giants... only time will tell.. certainly going to be an interesting year.