Using Flash, PhotoShop and PowerPoint, you can produce animations that can explain your research as no static image can. Chapter 3 of Explaining Research covers how to find or develop animations and incorporate them into talks. Here are excellent examples of what is possible:

• Biointeractive animations, Howard Hughes Medical Research Institute
  
• BioVisions
• Cell Size and Scale Illustration, Genetic Science Learning Center, University of Utah
• Eduscapes collection of links to Flash animations
• How Stuff Works
• Johns Hopkins Institute for NanoBioTechnology Animation Studio
  
• Kyrk, John, Cell Biology Animations
• Molecular Workbench
  
• NSF/Popular Science Vizzies visualization challenge
• SciDAC Best Scientific Visualizations of 2009
• Vila Cristobal, Nature by Numbers
  
• XVIVO scientific animations