All About Romance The lists section has lots of interesting categories, many titles with brief but informative annotations; htere are also "historical cheat sheets" providing background on the historical periods that commonly serve as settings for romance novels as well as articles on romance.
All Romance Writers This site allows the reader to explore romances by categories: contemporary, fantasy, historical, paranormal, etc. by clicking icons at the top of the page. Another nice feature shows up in the search tools at the left of the page, where you can search by series.
Bella Online: Romance The Books & Music segment of this women's site has a very nice section on romance novels. It includes articles, interviews and reviews, as well as an annotated list of links to author web sites.
CataRomance This site is dedicated to category romances--those prolific series by Harlequin, Silhouette et al. The most valuable part of the site is the reviews as these series are not often reviewed.
Historical Romance Writers Author bios and interviews, book reviews, and a listing of titles by time period are a few of the items available here.
Romance Club Check out the "Featured Authors" and the the "Featured Previews".
Romance Reader Offers ratings and reviews on contemporary, time travel, futuristic and category romance, as well as author interviews.
Romance Reader's Connection Book news and reviews for a wide range of romance genres: contemporary, historical, inspirational, romantic suspense, the paranormal. Also highlights an author of the month and a feature of the month.
Romantic Times Only selected sections of the magazine are online, but there are reviews, author biographies, theme lists, and links to existing book groups.
Sequels and Prequels for Romance Novels All of those pesky series, arranged in order. There are separate sections for single title, category romance and publishers' series. Not up-to-date, but useful for older series.