Hikari is an adorable shrine to Cloud and Aeris. Not only are her layouts wonderful, but it has content that can occupy you for hours. One of my faves. ^_^
Destiny Fulfilled has got to be the most well-researched Cloud and Aeris site on the internet, filled with very thorough essays that examine FF7's Love Triangle.
Cloud x Aerith Forums
A wonderful place to meet and hang out with fans of the CloudxAeris pairing! Lots of interesting discussion, and lots of fun. If there is something new about Aeris on the internet, this forum will be the first to
Shrine to Cloud & Aerith
This shrine to Cloud and Aeris is so cute, as well as easy to read (something my horrible eyes appreciate). The Cloud/Aeris Memorial video they made is also wonderful.
This is a website supporting Cloud and Tifa's relationship. The site has a lot to read and has a WONDERFUL image gallery with some beautiful pictures of Cloud and Tifa. ^^
The Fair Ophelia
This is a really cool CloudxAeris site with an awesome setup. Theres essays, a great media section, and lots of related links.