I read through some of that thread. Looks like we'll have an official word very soon. Nonetheless, Rich's XDm trigger jobs are unique from other XDm smiths in that he uses only the stock parts. We'll continue to wait for a final ruling, but this gives me a bit of a comfort factor. :-)
The guide rod will be fine. The gun can't weigh more than two ounces over its listed weight. Rich has been building xd's with the tungstens for years. I think he knows what he's doing. As far as the trigger work, there is a huge thread on this forum discussing proposed changes. The board is working on a cleaned up version of the production rules which will be out soon. Ya have a sweet gun. Go shoot it.
Good news about the guide rod. as far as the 2009 rules providing for "internal work", it's not internal work on the trigger, just polishing, and polishing isn't a trigger job. I found this thread, and it's pretty clear the BOD doesn't think it's there either. No offense to Rich, but rules change. I do think from reading the thread that it will change again, but currently it's not there.