DigitalRev (a "Hong Kong based online photographic equipment provider") have just been invited to "yet another canon product release on 23rd Feb." Could this mean Nikon will make an announcement next week or the week after too?!! Hmm very interesting.
Though in all honesty it seems this canon "surprise" announcement will either be the new 60D or some lenses. If it is the 60D I'd be hopeful Nikon could also unveil the D7000 (D90 replacement)? Not likely a D700 replacement.