I hope I'll be wrong on this, but I don't think we'll see a TP release today, at least not a public one. I mean, if their intention was to provide a public preview of the next version of Windows, they wouldn't have done an invitation-only event. Therefore, I think if they release some bits today, only the people who are attending will get an invitation code to download it (...and because these ISOs will contain the bits to identify the owner, Microsoft can finally find out who of all the trusted press and blogger guys are leakers, killing two birds with one stone ).
Ladies and gentlemen, we are produly to announce that we'll be calling the next version of Windows.......