Okay, guys. So everything kind of exploded this weekend, but I'm finally getting around to posting some links which might be helpful. Possibly. These are just some things that I've stumbled upon during my internet escapades in the past.

http://www.sherlockology.com/ This is the biggest and most active Sherlock fansite around right now--I don't know if it will be helpful, but it might be a good resource.
http://www.youtube.com/watch?v=EdYHfeTLF90&feature=plcp&context=C4a5fd6cVDvjVQa1PpcFPSps1C40oq7NE6KHIefZL_2pGj8kQyz4M%3D BBC has posted some short scenes from the show. The rest can probably also be found online from other sources.
http://www.johnwatsonblog.co.uk/ BBC also set up blogs for Sherlock, John and Molly. I'm just going to post John and Sherlock's blog for right now. Also, major spoiler warnings for Series 2.
http://www.thescienceofdeduction.co.uk/ And Sherlock's blog. It's not as spoilerific, though.

I'll post more links as a I come to them. You might also browse places like Tumblr, because the fan base is very active and very, very vocal. Once again, spoiler warnings. And content warnings. And weirdness warnings. But it's worth a shot if you're interested.