In an unexpected piece of news, George R.R. Martin has revealed that he spent most of Christmas and New Year's in hospital suffering from an e.coli infection. Happily, he has beaten back the infection, returned home and will be able to attend the previously-announced Television Critics Association events in Los Angeles on Thursday and Friday, as well as his book signing in Pasadena on Sunday.
Most intriguingly, GRRM had previously revealed that he hoped to make an exciting announcement at the book signing. Obviously this was something unrelated to the TV series (which could have been announced at the TCA press junket instead) and, interestingly, Martin has said that he will not now be able to make this announcement due to his illness, meaning it's probably not another licensing or movie deal for another project (which could presumably proceed regardless). In addition, Martin has no current editing or writing projects ongoing outside of A Song of Ice and Fire. Whether this was going to be the completion announcement of A Dance with Dragons or not remains open to rampant speculation, but whatever it was would now appear to have been delayed by at least several weeks, if not a month or so.
Best wishes to GRRM for a speedy recovery. This is not a fun virus to suffer from.