- gmail-like labels for feed categories (needs ui thinking)
- optional three column layout
-- optimize rpc responses (e.g. now forceUpdateFeeds returns all tag/feed/vfeed
-information, see if tags or feeds are required and return only them)
- email notifications (digest/single-email mode)
- download linked images and store them somewhere in case the links get broken
- mark item as unread (maybe add combobox in view frame to mark as read/unread/starred)
-- "mark as read" is broken for vfeeds/searches
+- catchup for tags