The Campaign for Real Ale's headquarters WWW site.

Aylesbury Vale & Wycombe
Mid-Chilterns
North Oxfordshire
Oxford
South Oxfordshire
Swindon & North Wilts
West Berkshire
Reading & Mid-Berkshire
South East Berks

Archers of Swindon.
Arkells of Swindon, just over the border in Wiltshire. Try their Kingsdown strong bitter!
Brakspears ex of Henley on Thames, now (after a short interlude) again brewed in Oxfordshire by Wychwood, with the original double-drop system.
Butts of Great Shefford is a small but popular fully organic micro, just over the border in Berkshire. Their bottled beer is available in local branches of Waitrose, or can be collected from the brewery by arrangement.
Hook Norton of ...
Morland ex of Abingdon, at one time White Horse Branch's one and only local brewers, now alas part of the Greene King empire.
Ramsbury Brewery, a micro just over the border in Wiltshire. Much admired beers!
Wadworth of Devizes.
West Berkshire Brewery of Yattendon and Frilsham; a micro whose output includes the award-winning Dr. Hexter's Healer and Maggs Magnificent Mild, and a different brew every month!
White Horse Brewery, our LOCAL sparkling clean micro in Stanford-in-the-Vale, Oxon.
Timothy Taylor of Keighley ... yes, we know it's not local, but ...
Wychwood of Witney.

A directory of Brewers, UK and worldwide.
A directory of UK Real Ale Breweries

uk.food+drink.real-ale devoted to discussion of real ale, pubs, breweries, etc. The best place for hot gossip.
uk.food+drink.misc is slightly off topic, but has some beer-related themes.

Icknield Way Morris Men; well they drink enough of the stuff ...
Beer Mad - all things Real Ale related.

The Brewery, which contains the incredible Cats Meow 3 recipe database.

Oxford Bottled Beer database

Beer in the Evening
Good Pub Guide; OK, its a bit foody, and all the ales are well kept, but ....