Leakages: picture of a "Nikon D800" at Nikon Europe with Jan/Febr announcement?
A couple of dpreview forum threads (thread #1 and thread #2) have spotted a small picture of an alleged Nikon D800 in a new Nikon "dSLR family portrait" banner at the Nikon Europe/Germany websites! And some HTML/XML reading hints of a January or February announcement. [see trade show calendar]
Meanwhile, if you already digested, used, worn out the shutter, and got tired of the Nikon D4, fear not! The speculation and the wait for a Nikon D5 has began in the forums [corrected link; I accidentally messed up the html]