PLEASE SUPPORT THE SERIES! Buy the official, licenced books when they are available in your language. Money talks – if you love Vampire Knight, be sure to buy the books so that the powers that be know people are buying them and we will continue to get more cool VK stuff.
That being, there is a huge delay between when the readers in Japan get the serialized chapters and when we finally get the novels in English (or other languages). Devoted souls who want to keep up with the most recent events as they happen can find the scanlated chapters on the following sites, among others:
Manga 2 U
Manga Reader
Live Journal
The LJ community often has the best scans, even if it is more difficult to find them.
Be sure to buy the books, even if you’ve already read the scanlations!!