I think you have a lack of responses because, for a long time, people have been coming here and creating an account so they can ask about making an XBox 360 laptop. Nothing ever seems to come of it, and members are probably getting tired of telling people how hard a 360 laptop is. They see "XBox 360 laptop," and their eyes glaze over like so many doughnuts.
The truth is that it is probably the toughest portable project possible and can only be pulled off well by the best of the best. Don't let the lack of interest put you off to the project if you think you can do it.
If you surprise everyone and show us a system hacked apart and ready for casing, you will get a good deal more assistance from this forum.
By the way, it's nice to see well-written posts as you have, so you've got that going for you.