But, other people are writing interesting stuff, so I'll pass that along to you, with apologies that much of it is not precisely current:
Over at John Scalzi's Whatever, guest blogger Jim Winter takes on one of my favourite hobgoblins, and champions the singular they:
If you look at the history of the English language, it becomes clear that "they" used for gender non-specific singular is more than feasible. In fact, it's almost mandatory. Why? English has no gender-nonspecific singular pronoun except "it."And we don't like calling people of indeterminate gender "it."
Hey, I'm with Jim. If it's good enough for Jane Austen, it's good enough for me.