No, not really. I think there's something in the works for grouping nodes together into a collapse-able node, like ShaderFX used to allow. I can't recall where I saw that, but could be useful for organizing large material networks.
Do newer versions of 3ds Max offer the possibility to transfer SME view tabs (so the exact layout/representation/ arrangement of the material nodes as opposed to simply merging the materials / material trees) between files? If not, are there tools for that? Couldn't find anything, and people don't seem to ask for it much,…