One thing I hadn't seen mentioned anywhere else is a blurb about Spitzer's observations of 2003 UB313:
QUOTE
Recent new observations with the infrared Spitzer Space Telescope have allowed Brown and his team to confirm that 2003 UB313 is indeed larger than the previous KBO record holder, Pluto, by about 20%. [...] The size measurement will be finalized soon, but "if it's not larger than Pluto, I'll eat my telescope," says Brown.
That kind of implies that the Spitzer measurements from late August are in and examined - maybe an official announcement Real Soon Now?