A busy first day at the SharePoint Conference so I'll start off with a quickie.
As most of you know already, SharePoint 2010 will use the ribbon interface for editing. I personally like the ribbon from a UI perspective compared with the old editing UI for SharePoint 2007. Some might argue that it's a bit cluttered and the context sensitive editing may be confusing to new users. I think it's something that users can grasp in short fashion especially if they use Office 2007 or 2010.
Something that's new to me in 2010 are the AJAX form dialogs. Pretty much any new item creation is now done in a modal dialog now instead of taking the user to a different form page in 2007. This is great as it keeps everything in context for the user.
An added benefit of the ribbon and form dialogs is that in most cases we no longer have to design for or make design decisions regarding these edit mode elements anymore. They are pretty much separate from the rest of the page from a design perspective.