They have indeed released a little over 2 dozen titles from Uni Classic Horror days. They can be found at any online etailer and most home video stores. They even sell them at the Kmart by me. So far they released the entire Frankenstein, Mummy, Dracula, and Wolfman series. A couple of the Abbott & Costello titles from the A&C Meets series and a handfull of other titles. Rumour has it they will be releasing several of their Hammer titles on DVD in the next 12 - 18 months. Scroll down this page linked here and you'll find the titles availabe.
Universal at DVDEmpire