Well, the simplest answer is...there isn't one, unfortunately.  Some swear by BML, some swear by HPW and lots don't feed either.  The dry food-absolutely not necessary.  There are exceptions but they should not have a reason to wake up during the day and eat.  With my 6, I've never seen one out during the day eating in almost 3 years.  Here are some links:  
Scroll down a bit for descriptions of different diets:  
http://www.suzsugargliders.com/feedingyourglider.htm
  A good recent thread on diet:  
http://www.sugarglider.com/glidergossip/topic.asp?TOPIC_ID=24924
  Pellets:  
http://www.sugarglider.com/glidergossip/topic.asp?TOPIC_ID=24413