Keyboard shortcuts
To maintain familiarity let's copy Google Reader shortcuts as much as possible.
You can find planned Reader-like shortcuts below. Items in bold are already implemented in the new UI branch.
j/k item down/up selects the previous/next item in the list
space/shift-space page down/up moves the page down/up
n/p scan down/up in list view, selects the next item without opening it
shift-n/p navigation down/up selects the next/previous subscription or folder in the navigation
shift-x navigation expand/collapse expands or collapses a folder selected in the navigation
o open/close item in list view, expands or collapses the selected item
enter open/close item in list view, expands or collapses the selected item
shift-o navigation open subscription opens the subscription or folder currently selected in the navigation
s toggle star stars or un-stars the selected item
v view original opens the original source for this article in a new window
m mark as read/unread switches the read status of the selected item
shift-a mark all as read marks all items in the current view as read
e email item opens the email form to send an item to a friend
a add a subscription opens the "Add a subscription" box in the sidebar
? keyboard shortcuts help displays a quick guide to all of Reader's shortcuts