I do like the idea of grouping and/or merging! I would love to be able to easily merge my snap with another, because deleting it and then adding it as a related link somewhere else is annoying. It gets even trickier if the post gets up-voted or links are added, because then I don't feel like I can just delete it as usual. Maybe the merging thing would resolve this whole issue? I'm certainly in favor of it if it can be arranged.

I'm sorry I missed that other discussion, but I'm glad it's a sticky. :)