This was in an article that discussed many things, but I thought this part was of interest. Looks like I have been wrong about the 787-10 and wether or not it was actually under consideration. Looks further than that to me. I know there was an earlier thread on the subject, but it has been locked out for some reason. So here we go:
Further out, Boeing is working with interested customers to define the 787-10, which has yet to be launched.
"It's not a matter of if for the 787-10, it's a matter of when," said Bair. "We continue to see good interest in this airplane and are working to define what the best offering will be. We have time. In fact, we've moved out the anticipated entry into service for the -10 because there is such high demand for the initial versions of the airplane. We see the 787-10 being introduced sometime around 2013."