The default keyboard shortcuts are:

     C-r: Refresh
     C-h: Focus groups list
C-l, C-k: Focus articles list
     C-j: Focus preview pane
     C-q: Quit
       k: Move up in list
       j: Move down in list
       h: Move left in list
       l: Move right in list
       g: Move to the beginning of list/text
       G: Move to the end of list/text
      CR: Select item in list
       n: Publish new article
       r: Reply to selected article