The Division of Invertebrate Paleontology recommends the following to those wanting to pursue an interest in invertebrate fossils.

Websites

University of California Museum of Paleontology
http://www.ucmp.berkeley.edu/

The Paleontology Portal
http://www.paleoportal.org/

Further Reading

Fossils of the Burgess Shale
Derek E.G. Briggs, Donald H. Erwin and Frederick J. Collier
Washington: Smithsonian Institution Press, 1994

Trilobite! Eyewitness to Evolution
R.A. Fortey
Knopf, 2000

Trilobites
R. Levi-Setti
2nd edition, Chicago University Press, 1993

Wonderful Life: The Burgess Shale and the Nature of History
Stephen J. Gould
New York: W.W. Norton, 1989

Professional Societies

The Paleontological Society
http://www.paleosoc.org

Society of the Preservation of Natural History Collections (SPNHC)
http://www.spnhc.org/

Natural Science Collections Alliance (NSC Alliance)
http://www.nscalliance.org/

Discussion Groups

The Natural History Collections Listserver, or NHCOLL-L
A general purpose electronic forum for those with an interest in the care, management, computerization, conservation and use of natural history collections.