I would like to see the scikit become an ndimage replacement, however that would require us evolving to support nd-images rather than 2D images.
Ah, yes, I was forgetting that.
Not something I'd be opposed to necessary. In truth, there isn't a whole lot of functionality in ndimage, and ignoring the nd part, we could implement all of it ourselves quite easily; a fast convolution being the barrier to entry.
I do rely on the ND part myself, but only for the "interpolation" routines in 3D (I also use "filters" in 2D). Generalizing understandable 2D interpolation code to work for 3D/ND might be a more realistic thing for me to help with in future, though, than contributing to ndimage (it's always tough to find time, but it seems more of a bite-sized problem). I suppose the question is just whether you and Stefan want to support >2D at all... Cheers, James.