With the release of Adobe Camera Raw 3.5, Thomas Knoll took time to detail both the coming of ACR 3.6 in the fall and of the Beta 4 release. Of concern to a lot of people is the Nikon D80 and the Canon 400D (XTi), which is not in the ACR 3.5 release. Thomas says the ACR 3.6 release is an accelerated cycle and will cover these and other cameras released at Photokina.
Lightroom Beta 4 will be released before this and will include both cameras.
http://www.adobeforums.com/cgi-bin/webx/.3bb6a869.3bc1b01e contains the full information.