Digital Public Library Goes Live

The Digital Public Library of America (dp.la) is going live this week, today in fact.  Remember Google Books--this is more ambitious.  From the announcement, it will be: "

• First, an easy-to-use portal where anyone can access America’s collections and search through them using novel and powerful techniques, including by place and time.
• Second, a sophisticated technical platform that will make those millions of items available in ways so that others can build creative and transformative applications upon them, such as smartphone apps that magically reveal the history around you.
• Third, along with like-minded institutions and individuals the DPLA will seek innovative means to make more cultural and scientific content openly available, and it will advocate for a strong public option for reading and research in the twenty-first century."

One thing which bugs me is all the information which is not easily available, even though it's public. For example, trying to access the Congressional Record for years before roughly 1990 is difficult.