This is cool... I knew IBM (er, Lenovo) did this, but Dell does it too. They have an online site with all of the service manuals and documentation for every machine they've ever sold. This includes detailed instructions on disassembling and rebuilding laptops.
Even more cool is that the archive goes back to the beginning, back when Dell was called PC's Limited.
Note: The IBM link above is actually still on the IBM site... I expect the link to break whenever Lenovo takes the contents.