Ah, apparently there were two other winning tickets sold this week!

[conuly]

And I bet each and every one of them wishes they'd won last week instead! (But not the other two, naturally.)

Anyway, I know that it is now officially behind the curve, but just one more link on the subject:

I just bet $1.3 billion to win the Powerball jackpot — now watch probability shred my money

And if you don't like the simulator they use, there are other ones listed here. I doubt your odds are any better, but like the man said - hey, you never know!