Edith Wharton's biography.
http://www.npg.si.edu/exh/wharton/whar3.htm
An attractive site, with photos and a detailed biography of Edith Wharton.
The Edith Wharton Society.
http://www.gonzaga.edu/faculty/campbell/wharton/
Devotees of Wharton maintain this excellent resource, with links galore and information on all things Wharton.
Snoop around here, and you can find Wharton's correspondence in the archives.
A good resource for primary source information on Wharton and other writers.
A well-designed site with information on Edith Wharton and her work.
http://www.geocities.com/EnchantedForest/6741/
There are a large number of links, and biocritical sources aplenty. An excellent resource.