Pinning messages is a great feature, but it would be outstanding if I can Group conversations, like having folders/subfolders. Example, if there's several pinned convos for a wedding, and several of my family, and others for work, I'll be able to group the pinned conversations so it would be a cleaner more organized interface and I'll be able to find what I'm looking for with ease. Let me know if you need me to elaborate further.