Just a few of the clipart images I found at iClipart.com while looking for Concerned:
Concerned, Attentive, Troubled, Interested, Involved, Implicated, Concern, Concerning, Group Of Concerned Penguins Standing Around A Passed Out Penguin On His Back, Concerned Young Man Thinking About Money And His Home And His Car And His Baby

Favorite "Concerned" Sayings?
'as far as you are concerned', 'concerned parents', 'concerned party'