This sounds very interesting, I would even help doing the port for the n800, if needed.
But I have to say I don't get exactly what this SID port is.
What did you port exactly? A default Sid debootstrap system? Even a default sid system contains so many packages so I'm quite surprised.
And then which repository do you use? Not debian's as armel is (unfortunatly not yet) part of debian architectures?
I don't get it sorry could you explain for a newbie?