On the shortlist were Cecelia Ahern's Thanks for the Memories, Lesley Downer's The Last Concubine (set in 1860s Japan), Linda Gillard's Star Gazing, Susanna Kearsley's Sophia's Secret (alt title The Winter Sea, timeslip/romantic suspense with a historical novelist as protagonist!), and Judith Lennox's Before the Storm (generational saga set in early 20th c Cornwall). More details on the shortlisted books at the Romantic Novelists' Association website.
For those unfamiliar with the award, "romantic novel" does not mean "romance novel." It is better described as a novel with romantic elements. Philippa Gregory's The Other Boleyn Girl won the award in 2002, as did Rosamunde Pilcher's Coming Home in 1996, Reay Tannahill's Passing Glory in 1990, and Valerie Fitzgerald's Zemindar in 1982. See a list of all winners here.
Of the novels on the 2009 shortlist, only the Ahern and Gregson appear to have US publishers (or will; the Ahern is due out in April). Alas.