I met the chief scientist from DigitalGlobe at a conference a year ago 
and he, impressed with our work, decided to provide us with over $20k 
work of WorldView-2 imagery for Baltimore at no charge.  We also have 
Landsat, 4-band NAIP from two years, LiDAR, and IKONOS over the same 
area - so a great collection of remotely sensed data from a wide range 
of sensors for a common geography.  All of the data is licensed to UVM, 
but I have not put it on the GIS Data Shared Drive as I still need to 
work out the space issues there.  I did want to mention it in the event 
any of you are interested in using it for teaching and/or research 
purposes.  Please let me know if you are interesed in a "data dump," and 
we can exchange it via external drive.

Best,
Jarlath

-- 
Jarlath O'Neil-Dunne
University of Vermont
Spatial Analysis Laboratory
Web site: http://www.uvm.edu/~joneildu/
Blog: http://letters-sal.blogspot.com/