I'm a fan of Nora Roberts as well as her alter ego, JD Robb, and always look forward to her new books, though I don't buy every one. I usually buy her Robb books once they go to paperback and I get her Roberts books from my library. The ones that I really like I buy when they're available in paperback. I like to know when they are being released, as do many of her readers, and Roberts thoughtfully provides a schedule on her website. She also just sent out her newsletter with a schedule of new releases (not re-releases) for 2012. I've reprinted it below and here's a link to the full release schedule on her website.
Celebrity in Death (hardcover)
The Witness (hardcover)
The Last Boyfriend (trade) The Inn BoonsBoro Trilogy #2
Delusion in Death (hardcover)
The Perfect Hope (trade) The Inn BoonsBoro Trilogy #3
The newsletter also had an excerpt from the next JD Robb book, "Celebrity in Death". There will be a link to the excerpt on her site in a few days. Enjoy!