Over time we have built many styles to present information on a page but we haven't formalized the use. Once we get the CMS going so you can edit your own content we'll be adding a library of styles you can cut and paste for your own content.
Web Style Guide
Based on theBy Patrick Lynch and Sarah Horton
Writing for the Web by Jakob Nielsen, distinguished engineer; PJ Schemenaur, technical editor; and Jonathan Fox, editor-in-chief, www.sun.com