Threaded Private Messages (Rails 3)

I've found simple-private-messages开发者_运维百科, but I'm interested in a gem/plugin that includes message/conversation threading, or recommended approaches for modifying simple-private-messages to include that capability.

I know it's almost a year later, but you could try has_messages_generators. It creates threaded private messages with views.

I know it's almost 2 years later, but multi_recipient_threaded_messages is based on simple-private-messages and looks exactly what you wanted at that time. Salute.