http://www.hopkins-aids.edu/hiv_lifecycle/hivcycle_txt.html Excellent flash animation of the life cycle of HIV from attachment to assembly of viral proteins.
http://mmbr.asm.org/cgi/content/full/67/2/226/F1 Graphic depicting the influenza virus assembly and viral surface receptors.
http://mmbr.asm.org/cgi/content/full/67/2/226/F2 Graphic depicting the measles virus assembly and viral surface receptors.
http://mmbr.asm.org/cgi/content/full/67/2/226/F3 Graphic depicting HIV assembly and viral surface receptors.
http://www.mcb.uct.ac.za/tutorial/virusent.htm Excellent website with graphics depicting the cell membranes of prokaryotes and eukaryotes and viral entry with each type of cell (plant, animal, and bacterial cells).
http://microbiology.columbia.edu/PICO/Chapters/Cellular.html Graphic depicting poliovirus life cycle.
http://biosingularity.wordpress.com/2007/03/04/3d-animation-of-hiv-replication/ Animation of HIV life cycle with great depictions of viral protein conformation.
http://www.stanford.edu/group/virus/index2.html Excellent website from Stanford University featuring micrographs of each virus family, also contains multiple links to other virology websites.