xmonad float hack

import XMonad.Layout.PerWorkspace

-- then in your workspace section:

myWorkspaces    = ["1 Mail","2 Web","float","4","5","6","7","8"]

-- and then specify the layout in your hooks:

-- hooks, layouts
#
        layoutHook         = myLayout $ onWorkspace "float" simplestFloat
#
        manageHook         = myManageHook,
#
        handleEventHook    = myEventHook,
#
        startupHook        = myStartupHook,