varanus.nl

It's in the Netherlands, operates in english, and is very dedicated to proper varanid husbandry. While there are some "look at my lizard" threads, the main aspects of the site include:

captive care and maintenance
reproductive efforts and successes
proper enclosure construction
health issues
varanid photography in the wild

There are many very knowledgable keepers on this site; proper sentence structure, punctuation and use of latin names ("savs" and "Niles" are not acceptable due to the multitude of common names worldwide; and the members are global) are mandatory.

I feel it is THE definitive varanid website. Well worth checking out.

Chris