A problem with trackback in version 1.5:
The trackback requests are sent to other sites as soon as you hit either 'save' or 'publish' (even when you've edited the timestamp to delay publication).
So other sites can't find the link WordPress says is there, and don't give you the trackback link - even when you do finally publish.
Is this problem solved in 1.5.2?
If not, is there a good plugin that fixes it?