I believe I have pingback and trackback fully implemented (both the client and server). Both work against my test implementations of themselves, as well as against my test WordPress installation. That said, testing on the same server doesn't provide all the variables that could be involved. Thus, I am asking anyone who would be willing to please pingback or trackback against this entry — especially if you use MovableType (but even if you don't!). Five juicy asisaid points are yours for the taking if you do so, just for making me feel better about my code.
Note: I have it setup so that it only accepts one trackback/pingback from a given entry, so if you try to do both a pingback and a trackback, you'll find it only accepts whichever one is sent first. Also, I have everything in place for automatic detection of both types of pings, however, if your blogware needs to be manually fed a Trackback URL, you'll find one on the permalink'ed version of this page.
Thanks for your help! And thanks, once again, to Christopher, Josiah and Eduardo for their volunteering on my last call for help. Without the help of you three, I may not have gotten this far so soon.