Dutch Beer Portal
is a helpful guide to Dutch beers and breweries, fairly easy to follow in English.

The London Guide to Belgian Beer
The best site I know for information on the availability of Belgian beers in the UK

White Beer Travels
A very personal travel company that takes British and American groups on tours round Belgium. His website is developing rapidly and has comprehensive info on many major cities and other aspects of Belgian beer.

www.biercuisine.nl
This up-coming new site, mainly in Dutch, has some useful addresses for cafes and restaurants in Benelux that specialise in cooking with beer.