[quote=Doivid]
I may be misreading, but I think if you're able to delete an entire convo (which could be 2+), then that would cause some drama with people.Would it be possible for delete to simply remove it from your inbox, but not the other participant(s)? Or is that what 'leave' already accomplishes?
[/quote]

You're misreading. One of the things he said to keep in mind that people shouldn't be able to destroy a convo other people are still in. Delete would just delete it from your inbox, not for the other participants.