So far I have 27% of office 12 and a document on infopath that took nearly an hour to start downloading. I probably won't start trying actual development with it until sometime next week, but it's nice to see that most of the really frustrating things I've noticed about infopath 2003 development have been fixed. The site says vista isn't supported yet - hopefully that just means untested rather than not working.

 

And there should be another vista build to download the next few days. It's not that long ago that a gigabyte monthly downloads seemed like a huge amount I'd never be able to use..