Bertrand Le Roy has this on his blog today: http://weblogs.asp.net/bleroy/archive/2009/12/10/resizing-images-from-the-server-using-wpf-wic-instead-of-gdi.aspx
I’ve had issues in the past about clients complaining of the default thumbnailing capabilities of apps written in .net. The argument is that they can do a better themselves in photoshop (which is true…)
I haven’t tried Bertrand’s code out yet, but it looks promising.
more later - jv