The UMD movies for the Sony PSP seem to be developing into a nice business. Amazon.com lists now 250 UMD movies to choose from (some are not released yet, but available for pre-order).

In May we reported about the sales success of two UMD movies selling more than 100,000 copies each. Back then only 70 UMD movies had been published. A half year later the number of available UMD movies has tripled.
The bestselling UMD movie on Amazon.com is Napoleon Dynamite, followed by Family Guy and Fantastic Four.
The price of a UMD is comparable to the price of a DVD. Still there seems to be a high demand for watching feature length movies on the go with the Sony PSP.
Browse through all available Sony PSP movies.