I wrote a remote image viewer, so that you can interactively explore things like projections without having to copy *any* of the data locally. You can use it inside the Chaco-based explorer; all pixelization is done remotely and only pixelized buffers are sent back over the wire. I've stuck an example here:
but it'll be documented (along with the rest of the image panner stuff) in the 1.7 docs, specifically how to get the FURL info (~/.ipython/security/ipcontroller-mec.furl). Anyway, I'm finding it incredibly useful for exploring a huge amount of remote-living data. Hopefully somebody else will find it useful, too!