Family Medallion - Products, advice, information on including children in remarriage ceremonies.
Wedserv.com - An all-around great wedding planning site. Helps you organize your guest list, keep track of your to-do list, and more!
The Knot - Fabulous wedding site - Tons of great information!
Guides for Brides - A UK site specializing in wedding information, advice, competitions and a supplier directory for everything you would require - wedding gowns, cakes, bridesmaids dresses, venues, and much more!