Here is a really good site. Loads of info, and a reasonable amount of pictures: http://www.historylearningsite.co.uk/WO ... %20TWO.htm
All I get is a blank yellow page with a heading at the top and two adverts. Edit: Forget that, it's working now.
I've had a bit of a browse through it, not spent a great deal of time on it though. It's not bad, there's not much depth to the articles I read or looked at, but no glaringly obvious errors that I came across in the bits I glanced through, though the section on aircraft needs filling out to say the least (There are only 24 types mentioned and nothing Soviet Italian or Japanese, off the top of my head I could probably come up with 100 major types easily that need to be on any list of WWII aircraft which aren't mentioned). As a starting point for further research or a general overview, it seems a decent enough point to start from.