Ricepad has been reviewed on Music Tech Magazine issue 96 (February). With 7 points out of 10, the virdict is “A great performance tool, but it really needs better import options and longer resampling to make more use of its excellent real-time processing capabilities.”

Long resampling is a priority for the next updates. About the import function, I always suggest the free iPhone Explorer to easily import the sounds to Ricepad: bulk uploads with USB speed – free, for Mac and Windows ;)
[edit: Now Ricepad supports long recordings to file as well as three different methods to manage your files, including iTunes File Sharing]