I woke up this morning to find that my RSS reader had pulled a list of verbs changed in Radio.root–trackback is here! I posted a couple items, worked out adding the macro to the item template and everything is set. It's fast, and most of all it works. The pref page's help text is detailed enought and makes sense to all readers.

Thanks, Userland! Another $40 well spent.

Update: I found that trackback URL autodiscovery works fine.

Update 2: Jake posted the same info on his weblog. Hey Jake, can Radio handle more than one trackback URL?