Thanks very much for the reply, Lizard. I have, in fact, sent an email to
omnifocus@omnigroup.com. Did so earlier today (about 11:30 CST). Included a link to this thread as a means to make the connection between my issue and your assistance.
Again - I appreciate your perseverance in helping with this. In the meantime, I have to admit that MobileMe works quite well for the syncing between the desktop and iPhone clients. So from that perspective, I'm back up and running. But I'll also admit that I'd rather not pay the $99 a year for the feature and don't really have a big need for the rest of the MobileMe suite.
Getting WebDAV working again locally would be great to be sure. But I'm very clear on the fact that there are no promises from the OmniGroup that this will even be possible.