Engadget:

You'd have thought that DC Universe would provide full access to every DC comic, but not so -- even after an expansion, you've had to sift through a "curated" selection. Your options are about to expand, thankfully. As of April, DC Universe will provide full access to DC's digital comic library in April. Any given issue will have to be at least a year old, but you'll get to read comics dating back 80 years. while the company didn't put out a full list, you'll likely have the chance to flip through early Action Comics and Detective Comics issues. The pricing won't change, DC said.

This is what made me pull the trigger on a DC Universe subscription over the weekend.

Good news - they updated their comic reader to allow you to stream books versus downloading them.