New syntax/capability for WQL:
{"prepend": "foo", "type": "Place"}
returns all Place cards plussed to foo, e.g.:
foo+Eugene
foo+Chicago
fpp+Fort Collins
etc.
{"append": "my current cards", "type": "User"
returns all User cards plussed to my current cards, e.g.:
John Abbe+my current cards
Jean Russell+my current cards
etc.
If the specified card is not a valid virtual card, it should still be renderable as a link or something.