The second option is incorrect. We always wait *for* something, or we simply just "wait". E.g.
I am waiting for the bus.
Will you wait for me?
What are you waiting for?
No thanks, I'll just wait.
Sit there and wait.
You'll just have to wait.
2014年11月21日
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You need the "for" with wait, so the first is better.
Normally, we would use a different word order: I really cannot wait for our upcoming meeting.