Revit Building 9.1 and Revit Structure 4 are now shipping. I waited to post this article until the Revit Building web downloads were posted. Revit Structure is still not posted, will post a link when it becomes available.
This release of Revit Building is best described as an "alignment" release whose focus is less on major features than fixing issues, performance and coordinating the behavior of all versions of Revit. People who are "wishlist" watching won't find a lot to be thrilled about for this reason. We will have to wait for the next full release for the next round of major improvements and/or features.
I'm am pleased with the subtle improvement to Elevations however. The addition of the wordy parameter "Hide at Scales Coarser Than" means we now have a level of control over the visibilty of these buggers that is long overdue. Here's hoping we get the rest next time!
Download Revit Building 9.1 HERE and just READ about it. (remember you have to choose your language, then you can select version (RB9.1 or RBS9.1) which to download.