VISualize 2010 will be May 19-20 (the first day is for IDL and the second for ENVI) at the World Wildlife Fund in Washington, DC:

This event is designed to bring together IDL and ENVI users to provide opportunities for networking, sharing ideas, and working on strategies that advance our scientific data analysis and visualization community. We hope you will join us for one or two full days of presentations from professionals in a variety of industries who use visualization technologies for a wide range of applications.

ITT VIS is now accepting abstracts for talks. Pre-registration is required to attend and there is a $40 per day fee.