I just noticed today there's a contest in Wikipedia for the most improved article. Five people will be choosen to win $100 on December 9th!
The only catch is that the article must come from thier list of core subjects. So I reviewed the list and there 27 articles about classical music on this list. These articles range from composers - such a Mahler - to instruments such as the violin and trombone.
The contest is posted in your watchlist section of your user page.