Ok, here's tonight's preview - this is the editting interface during attachment upload. This is where EN2 makes it's biggest departure from vbulletin norm. Many of the sections open in interstatic popups - this makes for smaller page sizes on transfer and faster load times (once the considerable javascript overhead is cached - on the brightside PAM encodes and compresses javascript files which is not normally done by Apache). Some, like the main editor, have ads in their footers (gotsta show ads after all) but they are not the main part of the window nor are they in the way.
You'll note the windows have a see through me glass effect - this is one of the reasons the base colors are so bright - when they get subdued by the cover mask they still stand out enough to be noticed but not enough to be problematic.
The glass is a nice touch - better is the fact that within a few weeks of launch a user control to how strong the mask is will be put in place. The default is 50% black - you can turn it all the way up to completely obscure whatever is behind the interstatial or dial it down to nothing and let the pop up truely float and see through (not sure how legible that will be). Several of the other major javascript settings, such as how fast menus roll out or how quickly fade wipes run will likewise be user configurable though not at launch.
How configurable the set up will be for non-community supporters though is up in the air. Enough of the customizations will be turned on to give you a taste, but not everything.
Most features will be public overall initially for a trialing period before being locked down to community supporter only.
BTW - if you are wondering if the windows open in such a wierd positioning - no they don't. They always open in the dead center of the page. You can however grab them and drag them to where you want them to be on the page. You can even drag, scroll the window overall, then drag some more - say in case you want to read back over the thread and jot down notes without actually quoting.