Good question. My next door neighbor said something long time ago that stuck with me - "how big is big"? In other words, what seems enormous to us may be nothing compared to something else. What he meant was it's possible we're just beings inside some other life form, and if that's the case the universe would not be infinite.
Did you happen to see the threads on gravistars the past couple of days? If not, I might be able to link to them.
That's like a deja vu with Professor Donald Sutherland in the potsmoking party in Animal House!