Following the suggestion of Paul at THe Man Cave I added a suggestion of planking on the rampart, just made with strips cut from a cereal packet.
Overall I'm pretty happy with it, although at some stage I may add something to the interior of the rampart - maybe timber supports or even cover it with flock. It looks a bit bare at the moment. I'm going to build a great hall for my warlord to fit inside the fort, but might paint some more figures first. Next time I'll also do a better job of trying to stop the board warping.
I played a game of Saga with a friend last Thursday night using the fort - came up with a scenario with special rules for breaking down the gate etc. I enjoyed myself, but I think my mate missed the usual elves and pixies he tends to game with.