Leed, Drea. The Elizabethan Costuming Page (http://www.dnaco.net/~aleed/corsets/). ©1997-2000

I would recommend this site to anyone trying to research and/or recreate Elizabethan clothing.  Not only does the author provide good advice, but there are lots of useful links here for everything from head to toe, including (shhhhh!) undergarments.  There are even articles/links to such topics as blackwork, fabric colors, other countries, and (dare I say) Tudor history.  I would rate this as an extremely useful site.