Really good poem I came across this evening:

     Do not stand at my grave and weep.
     I am not there. 
     I do not sleep. 
     I am a thousand winds that blow. 
     I am the diamond glints on snow. 
     I am the sunlight on ripened grain, 
     I am the gentle autumn's rain, 
     when you awaken in the mornings hush, 
     I am the swift uplifting rush, 
     of quiet birds in circled flight. 
     I am the soft stars that shine at night. 
     Do not stand at my grave and cry. 
     I am not there. 
     I did not die.
     --anonymous

Though if you want a really good eulogy poem watch Four Weddings and a Funeral at the scene of the funeral eulogy.  I love that one.