Hi all,
I've long thought it silly that we have a way to flip layouts on the diagonal (Mirror), but not a way to flip them horizontally or vertically, e.g. if you wanted the master pane on the right with a Tall layout. However, I didn't particularly feel the need for this feature personally (no one else did either, apparently) so didn't bother. Well, today someone asked how to do this (treadstone on #xmonad) so I thought I'd code it up for fun. It's quite straightforward and seems to work well (respecting any and all gaps, can be applied to any layout, etc.). I've attached a darcs patch; I'm intentionally refraining from pushing it since there's a code freeze on, but figured I'd send it to the list so anyone who likes can test it out (if you don't know how to apply a patch -- just save it somewhere, cd into the XMonadContrib directory, and 'darcs apply /path/to/patch'). Questions, comments, and patches welcome.
-Brent