I may be able to take a business trip to Portland in the Fall, so I'm starting my search early.  I've come up with a few possibilities on the TER board but I though I'd ask about unreviewed BP possibilities, even though experience would suggest that most are scams.  The following are some comely, buxom BP ads:

http://portland.backpage.com/FemaleEscorts/super-hot-sexy-blonde-22/5468104

http://portland.backpage.com/FemaleEscorts/andgt-38dd-blonde-barbie-andlt-24/4569558

http://portland.backpage.com/FemaleEscorts/sexy-gorgeous-blonde-120-23/4876142

http://portland.backpage.com/FemaleEscorts/super-hot-sexy-blonde-22/5468104

http://portland.backpage.com/FemaleEscorts