Horray! If only they'd make a 64-bit version now..

Seriously, though, hopefully Finale will have to follow suit now.

Yes, indeed. But I think Finale must be tied into some sort of license with NI for their vst support. Perhaps that license has a timeline, in which case we may see full hosting from Finale in the future. Mind you, I feel like there's something kind of sloppy about Finale in the last few versions. I don't know what it is exactly, but it's starting to feel extremely bloated, to me. Personally, I'd like to see some innovation, and attention paid to the basics again - for example, I'd love to see a true non-mensural mode in *any* notation program. That would be innovation, IMO.
I'm in the Sibelius camp for now, and relatively happy. We'll see what Sibelius 5 is like in actual practice at the end of the month, when it actually ships.

Perhaps someone should build a totally modular music notation environment. One in which the user can assemble functional elements to determine precisely how their user experience works. Now that would be cool...

J.