Dr Eades protein power website has great recipes on the blogs
the south beach cookbook is great for fancier restaurant inspired meals, and indeed the diet gets its name from recipes created by chefs at those places in Miami.
Atkins for life and the Carb addicts diet are great sources, also the 4 corners or Go diet by Drs Goldberg and Omara have good recipe sections, as do the Zone books
all of these have websites with great recipes and links
3fatchicks.com reviews popular diet programs, has forums and links to lo-carb sites (as will as to diet plans based on other philosophies)
bear in mind SB has also a low-fat mentality, while Atkins and some of the others do not (although all ban transfats), so do look at that if it is of concern to you