Yes, the biggest issue right now is knowing whether or not we actually have the flawed part. Even though we appear to have the four bolt arrangement (at least on the bolts visible in the pics), they may have beefed up those bolts and requirement of the 5 bolt hub is now moot.
Having said that, the DW has been researching this heavily. The hub is made by Horton (found a sticker on mine) and there are numerous recalls on Horton hubs by several companies that use them.
DW (ain't she a peach...... talk about a dog on a bone!!) even found this TSB number SF-388A-F by FL issuing a recall in 2007. Not sure if if applies to us but here is the link:
FREIGHTLINER XC 2007 Technical Service Bulletins