very nice hammock-setup.
I tried to do it nearly the same way (though with the mast installed) with my North American Clark jungle hammock, but I think it will be too much hassle raising this construction while I´m on the water (16 ropes, the rain fly alone has already 8 ropes).
So I tried an on-board-tent-solution with a free-standing one man tent (The North Face Particle 13, not built any more). The poles of this tent are not too long, therefore it´s not very difficult raising the tent while on board. The entry of the tent is on the backside positioned at the inner half of the right trampoline.
If it should be fun sleeping in a tent on the AI, I will buy the ultraflat Vaude Bivi II tent (new for 2010, double-wall, double-entrance, very short poles). It will take the same position as the Particle 13, but the entrance will be above the main hull.
Pictures of Hammock and Particle 13 on AI: http://gallery.me.com/docslaw#100049&bg ... &view=grid
Another idea is to use a bedchair (angling equipment, very low-above-ground-version), the feet of the bedchair on the tramps near the left and right side of the main hull. To give me some shelter from sun or rain I will use a tarp wing, going from the left to the right ama, using a rope in the center line of the main hull to hold the tarp wing at a comfortable distance to the bedchair. This is a heavy solution, because a bedchair alone weighs about 8 kg (ultralight version).