Zappo
Explorer
Mark, I'm downloading the cleric PDF right now. I can tell that it will see use. 

You can use the bookmarks; just look for the bookmark button on Acrobat reader, and click on Spells (Alphabetical).I did have a suggestion as well: Their should be a page (preferably with a top-level bookmark) that just lists all spell names in alphabetical order as hotlinks. That way, if I don't know what level a spell is, I can still quickly find it. This page could be pretty densely packed, too; no real need for anything but the names, really.