Fold3.com has been working on the "Civil War 'Widow's Pensions' " for a while. In fact I can't remember when the project actually started. But looking at their blog posts it appears that they've been digitizing these images since at least 2008 and are now 5% complete.
The screen shot in this blog post indicates that the project currently has 5% of the images posted. Even if I don't count 2008 or 2014 (which is already nearly 1/6 over) in my computations, that means that the project has been up and running for all of:
[note: readers who want to obtain copies of Civil War pensions can still do so through the National Archives.]