Gruntled...

A word of fascination, disgruntled, one of many words that should technically have an opposite. Logically that would be gruntled.

I have found it is not just me that has found this an issue:

• http://www.worldwidewords.org/qa/qa-dis1.htm
• http://www.straightdope.com/classics/a2_264a.html
• http://www.answers.com/topic/gruntle
• http://www.urbandictionary.com/define.php?term=Gruntled