cheat sheets.

... no real cheat sheet for zsh yet.  

check these sheets out though:
  zsh_array
  zsh_bang
  zsh_case
  zsh_ftp
  zsh_glob
  zsh_if
  zsh_keys
  zsh_loop
  zsh_modifiers
  zsh_param
  zsh_process
  zsh_ranges
  zsh_rename