You'll find here diverse links about diverse things concerning Diving, Vietnam, ...

Informations about Vietnam...

Wikipedia
Scubalinx
Wikitravel
VietnamTourism
Lonely Planet
BBC - Vietnam
News Blog Fr-En

Forums concerning Vietnam...

Fr : Forum Vietnam Fr
De : Forum Vietnam De
En : Forum Vietnam En

Forums concerning Diving...

En :Scubalinx
En :Scubaboard
En :Scubadiving
En :Divers' Alert Network

Some friendly Dive Centers we reccomend :

Thailand : Koh Tao Divers