No fear, Mattlocked, that was just a joke I think. Have a look a this:

http://sherlock.boardhost.com/viewtopic.php?id=1014

And I love your new signature. You're hooked, aren't you? Arthur forever  .

Yes, I think they're going to do series 4. Davina promised me to post if and when tickets will be available. I'd love to be there to hear my own laughter later on … well, and to see Ben  .

I hope he'll be doing a lot more of Sherlock although if course it's nice to see him doing other films. I think in Star Trek for once I won't be on the side of the angels . But nevertheless Sherlock's something special.

yes  sherlock  will continue,  they start filming in january 2013 for series 3 of sherlock. But why do I get the feeling that they've already started?

Saw a really cute gif (?) on Tumblr.  It was a facsimile of a down-load button with the icon spinning round and round and the words "Loading Series 3" on it. Someone posted underneath  "Now that's just cruel !" 

I'm not keen on trolls.   

SusiGo--YEAH!!   But I keep seeing little signs that Ben and Martin are  back there now,  filming Sherlock.  Maybe it's my eyes that are playing tricks on me.

He was just delivering the 'company line' as it were. It's what they all had to say before anything was known about what was in the episode.
It was a tease, nothing more.
Yes, later on, it leaves one wondering, but as you HAVE seen the episode now, you can see why he would say that. Everything except the surprising last few frames pointed towards Sherlock being dead.