The proper way to get yourself added to any of the large lists at MIT is to
send a message to <name-of-list>-REQUEST, e.g., CUBE-LOVERS-REQUEST.
Likewise for getting yourself removed from the list. Also, a macro for
swapping two corners and two edges (all on the same face, and without
flipping any of them), is (UUFLF')*5. There are probably shorter ones,
but I like this one because it requires remembering only a very short
sequence, making it easier to do when stoned/drunk/tired/etc.
I don't believe you can rotate a single center facie 180 degrees
without changing anything else, which means you can make a lot of
confusion for someone by inverting the diamond and coming up with
a cube that appears to have only one center facie flipped.