Scientists who study bioerosion (but not necessarily exclusively):

Richard Bromley (University of Copenhagen)
Evan Edinger (Laurentian University)
Tony Ekdale (University of Utah)
Peter Glynn (University of Miami)
William J. Iams (Memorial University of Newfoundland)
Karl Kleemann (Institute of Paleontology, Vienna, Austria)
A. Conrad Neumann (University of North Carolina, Chapel Hill)
Tim Palmer (University of Wales, Aberystwyth)
Marjorie L. Reaka-Kudla (University of Maryland, College Park)
Michael J. Risk (McMaster University)
Carlos Marques da Silva (University of Lisbon)
Carol Tang (Arizona State University)
Paul Taylor (The Natural History Museum, London)
Mark Wilson (The College of Wooster, USA)

Bioerosion Workshop Reports:

First International Bioerosion Workshop (Bornholm, Denmark, September 1996)
Second International Workshop on Bioerosion (Fort Pierce, Florida, USA, March-April, 1998)
Third International Bioerosion Workshop (Barcelona, Spain, August-September, 2000)

Bioerosion of coral reefs:

Images of bioeroded corals (Montastrea and Diploria) from NOAA
"Reefeaters" page by Pat Hutchings, Australian Museum
Coral health abstracts from literature (from NOAA)
Abstract of parrotfish bioerosion patterns (Marine Ecology Progress Series)
(There are numerous brief abstracts on the web found with a search engine such as yahoo.com)

Miscellaneous:

A casting technique for studying bioerosion.
Tony Martin's excellent Ichnology Website (for the study of trace fossils)