Some more info:
http://www.hayabusa.isas.jaxa.jp/e/index.html
http://www.isas.jaxa.jp/j/topics/top...busa_obs.shtml
Sorry, it is in Japanese, but it has the ephemerids and a contact to ask for computing ephemerids for predicting in other locations.
Hayabusa is expected to be about mag. 16, due to the solar panels attitude constraint. (See the figure that shows approach to the Earth, marked with "Sun direction".)