Small mice

                     _
                 .-.(c)
jgs       (_____( )  , "-.
                 `~  ~""`

                        \/   \/
                    _\ o \     @ \/  V
                 _|   \    ()     | o  <_
                  `. @ \()   @ |      /
             _>     \ . \  O      |() @ o
     ...

           _ ##                          .--------.
    ##  ### #####                   _____|________|______
    ######    ###                  (_____________________)
     ####      :               ...

From: zhuhail@vax.sbu.ac.uk

How about following two line pi?

                }--O--{
                  [^]
                 /ooo\
 ______________:/o   o\:______________
|=|=|=|=|=|=|:A|":|||:"|A:|=|=|=|=|=|=|
^""""""""""""""!::{o}::!""""""""""""""^
            ...

                (__)
               ([][])            "I have this recurring dream
               __\/_--U              about golden arches."..  (__)
              /\    \__                           ...

                   /:""|                 .****,
           (\/)   |:`66|_                @@@@@\ `,
            \/    C`    _)               aa`@@@\  \
                   \ ._|        _ _     (_   ?@@|...

 -=[ ice skater ]=-  7/99
                     _
                 __ ( }
               '---. _`---,
               ___/ /
             /,---'\\
                   //
        jgs       '==
           ...

        \ \
         \ \  ___,.,
  _,..--=";"*^^     5
 *         {         %
 {          }         }
  }          }        %
  %          { ___,,.-"%
   %_,..--==""^        %
   L                   &...