These are a couple of sites that have the whole Wicked script typed out. The first one is very clear and all on one long page. The second has multiple pages but lots of neat pictures. It's also connected to a site with interesting Wicked info and other stuff.
http://libretto.musicals.ru/text.php?textid=609&language=1 http://www.geocities.com/othersideoftheroad/1noonemournsthewicked For videos, check out youtube.com. Search for song titles, actor/character names, or 'wicked press reels' for a really clear picture. They've got all sorts of stuff. Note: videos can be used to practice choreography too.