Page Editor has issues with Marketplace Themes
I tried the badass Hospital Theme from the marketplace, but it has some issues (float:left on an h2) which cause the ZoneEditorToolboxContainer items to be off the screen.
adding float:none; to .sftbTitle seems to fix it though...
Appears also that menu items are navigable in the page designer...like clicking on a menu item loads that page (not in a new window)
The Hospital and Creative themes are designed for Sitefinity 3.x in mind. The have not been tested how they would work in a 4.0 website. However I think that it is a nice idea if we provided 4.0 versions for those themes.