What would even be cooler, is if someone created something within this forum that allowed users to "search" previous post.. this might cut down on repetitive questions.. hmmm...
Well, the Storm already does group all replied messages with the original message sent, which I think is good enough (although it's not very pretty); I'm not sure I'd like if it grouped all messages from the same person into one conversation, especially if you have a lot of different types of conversations with that person.
It might be a nice option to customize, though, since the Storm seems to be very fond of allowing you to customize things that probably shouldn't be customized.