Just use nid as the cache key as cache is specific to posts collection
Check when scrolling if at bottom or top of page
Add view for menu-bar and make clicking home take you to top
Hide menu bar on touch devices except when scrolling up

Copy of interesting UI trick from Google Now on Android
Scroll to top if click home only when PostsView is visible
Add a Drafts page to replace dropdown (not important enough for menubar)
Added dropdown menu