I just got back to Boston from San Francisco (had a great dinner and chat with Graham Glass last night) and my copy of iWork '08 had arrived.
I'm looking forward to trying out Numbers as I've been eagerly anticipating it for close to two years (I was disappointed '06 didn't have it).
From what I've seen online, I suspect Numbers won't be suitable for some people's high-end number-crunching but for the everyday spreadsheet work I do, it looks like a dramatically better approach than the mainstream spreadsheets of the past.
It will be interesting to see what the "more word processor than page layout" additions to Pages are like as well.