Over on the Windows platform (2000/XP) there's a new multi track sample sequencer under development. Membrane from Molecularbytes "opens a new dimension in the audio-editing-software market under the heading 'elastic audio'.
Membrane looks to all intents and purposes to be loosely based on the concept of Melodyne - insofar as it allows you to graphically easily edit, adapt and change audio data like you can when you edit MIDI data. It manages this by analyzing and separating the pitch and formant information within a sound and letting you mess with it's pitch and timing independently and a whole lot more besides.
Or in their words:
"Membrane analyzes and separates the most diverse physical characteristics out from the audio material, so it becomes freely variable and changable by the user. Aferwards Membrane resamples the audio material with the use of the changed characteristics. By this method you can assign completely new characteristics to the material, which are played in real time and without destruction of the original input data. "
An extra feature is their specially developed 'Added Resonance Wavetable EXtraction' technology. This enables the user not to have to make a distinction between rhythmical or melodic audiodata, but to be able to use all parameters for any material.
It's a fairly giant concept, so they've created a series of demos to give you the idea.