Use the keyboard! Once you got the focus out of the instant search box, all of the following work almost as you expect: UuRrLlFfDdBb for face rotation, MmEeSs for slice rotations and XxYyZz for cube rotations. (upper-case for clockwise, lower-case for counterclockwise)
I got it down to 19 seconds using the optimal solution from http://www.speedsolving.com/forum/showthread.php?47666-Googl...
I'm not doing it again, the interface is too frustrating.