I put an SPH2 on a monopod. It makes for a very light and portable system. I took the rotator off and used the top knob of the rotator to fix the SPH2 on the 1/4x20 thread of the monopod so I can put it on/off quickly. Usually I just leave it on.
The mm scales on the SPH2 are about the same as on my NN3 so I can use the same offsets I use on my NN3 for the SPH2.
Here's a couple of pictures. The thing on the lower part of the monopod is a Manfrotto pole level. When I pack it up, I point the camera straight up and put a cloth bag on it and stuff the whole thing in the pack. It only takes a minute to set up. The lens is a cheapo Soligar fisheye. I haven't weighed it but the whole thing -- camera, lens, monopod, SPH2 -- can't weigh much more than two pounds.
Here's a couple of pictures.
And here's a test pano I did with the fisheye -- 6 around no down shot. Unpatched and poorly edited nadir. Still working on a qood quick way to do the nadir shot but you can see how small an area I was working in.