Here's NPR's updating news feed about the explosions in Boston today. We were discussing how a lot of the information we get in the next day could be incorrect, and I thought it was interesting that the article mentioned this, as well as trying to get credible sources.

"Note that this is still a fluid situation. Information is bound to change. We'll our best to point just to credible sources. We'll update this post as we learn more."

I remember reading this feed probably less than an hour after the explosions went off, and the injury count was somewhere around 20, now it is climbing towards 100, although this may or may not be a reliable number yet.

Here is the link to the feed, if you're interested: 
http://www.npr.org/blogs/thetwo-way/2013/04/15/177349725/two-explosions-rock-boston-marathon-finish-line-at-least-3-dead-dozens-injured