We are now hearing from multiple sources that both Canon and Nikon have confirmed that they will not be releasing any new DSLR's at PMA 2009, so no Canon 500D, Nikon D400, Nikon D5000, Nikon D700x or anything else.
This shouldn't come as a surprise. Sony announced pre-PMA that there would be no DSLR releases until summer. The Canon rumor mill was alive with at least semi-credible rumors that Canon had delayed the 500D and other releases due to the economy. Nikon however, had a frenzy of rumors based on virtually no credible information (but lots of speculation) that up to 3 DSLR bodies were coming: The Nikon D5000 frenzy (NikonRumors even gave it 90% chance!), which appears to be based on a single post on a Korean forum; the Nikon D400 which is indeed due this year, and identified in a book accidentally put up on an Amazon site (the book is due for a July release); and the Nikon D700x based on pure speculation due to the D3x release and Nikon's pattern of releasing the same sensor in a cheaper body about 6-9 months after the launch.
We'll continue to post news in our News section, and track and rate the latest rumors in our Rumors section.