I read an interesting article about 'transracialism'...it's just not exactly what Rachel Dolezal wants it to be:
http://www.thelostdaughters.com/2015/06/transracial-lives-matter-rachel-dolezal.html
I think you're thinking on this, Jordan, is real, real wonky. Being trans (as in, transgender) is actually part of one's identity. It's a coming-out process. Someone who is trans makes the decision to publicly come out as such and then proceed to transition to some degree or another. Some people take hormones and go through numerous surgeries to make their outer bodies comport with what their emotional and psychological make-up demands. I worked with an actor who was born female but who identifies as trans. His name is Lauren. He wishes to be identified by male pronouns, but he doesn't feel the need to transition to present as male. I have a few trans friends who choose not to get all of the surgeries necessary to have the biology of one sex or another. Trans then becomes their identity...not female or male but somewhere along a continuum. There's a reason Facebook has added something like fifty different gender variations to their 'sex' choices. Gender is not binary, and I think when people choose to come out as trans, we should all do our best to honor their truth since they have taken the step to be honest about who they are with the world.
That's the exact thing that didn't happen in the case of Rachel Dolezal (at least, as far as I've read). This is a woman who appropriated a look and culture without being honest about it. She didn't come out as a white woman who was choosing to present as black because that's who she felt she was. She simply changed her appearance and presented as black. It wasn't about an honest accounting of her identity. She simply lied. Trans people (at least the ones that I know...and I know a bunch) make the step of living in the truth of their gender identity and expression. Rachel Dolezal did not. As this is the only transracial person I'm aware of (using this particular definition), I'm going to say that we're not at the point yet where this actually needs any kind of addressing along the lines of the concept of being transgender.