Keeping my work so that it dosent get static below the wrist is a challenge for me and I fight with getting great hand poses that are more then "just there." I came across a fantastic post over at "Flooby Nooby" that is jam packed with ideas and model sheets. Let me know if you know of other sites that have posted as well because I'm always interested.
Over at "Spungella they have a blog of animation crits called "Workshop Animation Feedback." Go have a look and enjoy there great advise.