I like playing with new tools... especially when they are free.
So, I've started playing with Sites.Google.com to see what it has to offer. Thus far, I'm not really sure what Sites offers that Pages does not... besides a potentially slightly more integrated hierarchy.
Are they planning on abandoning Pages in favor of this new endeavor?
It's hard to say.
But, then again, I've just started.
I'll be sure to let you know if anything comes of this.
Actually, I'm surprised that Google hasn't started a Wiki thingy yet. But they are working on other crazy things that sound potentially awesome.
Your Media Production Mentor