well, from this article it is better off to wait i guess ?
http://news.domain.com.au/domain/first-home-buyers/firsthome-buyers-beware-20110525-1f38k.html
http://www.news.com.au/money/interest-rates/ratings-change-may-lead-to-rates-rise/story-e6frfmn0-1226060823878
and this one...