Thanks for the tip on HK vacations, but I won't need lodging in Guam and will be staying longer than 5 days.
Is it possible to go PHL->somwhere in Europe->BKK->Guam? How restrictive is United on routing? I'm assuming I would have to get back via the Atlantic to avoid RTW ticketing?
The more and more I think about and search for availability, I'm thinking about booking an epic vacation (including 23 hour layovers for fun) and flying in business class throughout.
I also have a few more work PHL-SYD trips planned for this year, so I'll probably hit 1K before going to Guam if that makes a difference in booking.