They released an entire collection of stories under the title His Last Bow....*gets copy of Complete Sherlock Holmes off shelf*....They are:

Wisteria Lodge
The Bruce Partington Plans
The Devil's Foot
The Red CIrcle
Lady Frances Carfax
The Dying Detective
His Last Bow

The main plot of the S3 E3 storyline could be taken from any of the above.

sounds like a "plan" 

That's weird...I've never seen him talk like that before. He's quite right about being consumed by a role and everyone associating you with this one role, but I think the gaps they have between each series ensure that the actors get to do plenty of other really good parts. But...I guess if they wanted to have an even longer gap, I would be happy with that. I would seriously just keep waiting, as long as they were going to do another...if they weren't doing anther series I kind of feel like I wouldn't know what to do...

I don´t believe that you are just thinking positively, Susi. We don´t know under which circumstances that interview was made, how they´ve cut it eg. Although it´s a serious newspaper they definitely have cut it somehow, they never leave it 1:1. I am very much fighting the impulse to believe that .
I am more attempted to believe that Benedict Cumberbatch´s little Freudian slip with the signing of a fourth series is becoming true....

Yeah, I also thought about the possibility, that his statements where maybe put out of context. Or maybe, he just had a bad day by saying this .

This uncertainity is just so annoying! 

http://www.hitfix.com/starr-raving/comic-con-2013-sherlock-teases-season-3-resurrection-and-more

"Vertue confirmed that season four has been commissioned, though Moffat was less sure about a Sherlock film. "It's an interesting thought. It take ages to set up films... films are really slow compared to television. It would reduce the quality even further. But one never knows. We do have the two biggest film stars out there in our show. You wouldn't even get them in the same film now. But we do get them and they're always delighted to come back." (quote from the article above)

Well, I would say, just keep calm and don't worry, all will be well in the end

Sorry about the spoiler, but I guess by now it will be all over the internet anyway and it isn't really a big one, details weren't given.
But if the rest of you don't want to know about the scene, just read the quote I posted

I mainly posted the article because of the confirmation of series 4, which is the most important message to be had out of it!

Depends on how you see it, I guess I'm one of those people who don't know (and don't want to know) ANY plot information whatsoever, so that was quite a big spoiler for me.

But you're definitely right, the series 4 confirmation is hugely important (and already made my day )!