Google Wave Sandbox

This is the first time for me to use Google Wave. It looks a little strange as a fresh user. We MUST fully understand "what is a WAVE?"
  • IM?
  • Word?
  • Blog?
  • twitter?
  • SNS?
Are you understanding this? It might be better if there are some others in my Wave. I need to take a look at the Google Wave API to find more.

It just likes someone said, "It looks more like a Microsoft product, not Google!" I think, it still takes time to figure out "What's a Wave?"