Office 2010 RTM now available for download by Technet, MSDN subscribers
The actual Office 2010 page on Microsoft's site seems to be undergoing some changes right now, as it's been inaccessible at times. It could also be that Microsoft servers are getting hammered -- as they have before -- and are having difficulty keeping up with requests.
Since the downloads are now up on Technet, that means you can probably find both of these files floating around various torrent sites...which, as always, we don't recommend you actually download. As Forrest said, "You never know what you gonna get."
If you're a subscriber, however, head on over to your downloads page and grab the final builds!
update: As Cassandra pointed out in the comments, customers can also now pre-order the retail version of Office 2010. Win!