Update in link below
As the world patiently awaits knowledge of the suspect of the Boston Marathon Bombing, 4Chan and Reddit users have contributed to a massive "think tank" of images. Looks like some pretty interesting stuff and it will be fascinating to learn if these images corroborate with the reality. We'll keep this post updated as more information emerges. The subreddit this came from is called r/findbostonbombers. Apparently, these folks have taken to solve this mystery themselves. Here are their findings.
UPDATE 3:05 p.m. EST: NY Daily News is reporting that the image below is being considered by the FBI.
Please enjoy this information and conjecture, but don't be this guy. This is all speculative.