"Twitter? Tumblr?
Well if this post has nothing to do with graffiti, and may be interested or not, but anyway for those if they are interested then tell them that this is 
First Twitter, this is a rather new service but at his young age is already the most popular on the Internet, because of its popularity lies in its simplicity that seeks to answer a simple question: What are you doing right now?, the only thing you have to do is create an account and once created you can display on your friends, both to see what they are doing and to tell them what you're doing.
A many perhaps it will seem silly, but there are already thousands who are using it including my 
Second Tumblr, this is another community that I joined a few days ago, I was curious to see what it was and I was hooked instantly 
This service is about creating a "mini-blogs", which quickly put podes: links, photos, videos, phrases, etc.., in my opinion is another way to create a more personal blog where you can put all easily in the blink of an eye
So good I would recommend trying both services, and I leave the links to my two accounts, so you can see I do and see things other than the graffiti, if they create one of the two accounts to see let me know they are doing
Twitter Account: NEARsyx
Tumblr account: NEARsyx
I leave another link where SiRGt also speaks a little more about these two services: Twitter and Tumblr.
Try not to make many posts like this, they have nothing to do with urban art
I thought you were becoming more geeky