2. Some comments at Photoshop News make me think that Beta 2 will be released soon. Anybody have any specific information, especially on what features will be implemented?
Those who know aren't at liberty to discuss.
5. Will we always be working with export? Will there ever be a "save as" function in Lightroom?
"Save As" is already listed in the File menu, it's just not wired up. I would expect that it will work some time in the future.
6. Is it possible to break out the separate color displays in the Lightroom histogram?
No