Hey there are plenty of articles floating around in different sites with very rich content. There should be some service to aggregate all the links to these articles, with a search feature, with archiving, with categories and rating. Well guess we'll have to wait for now. Anyway here are a bunch of good articles that i found .
Update: Removed the link to the new release of SqlBuddy. ahem. The site i had referred to was another Sqlbuddy for unix. Sorry for the error.