I think that it will be a challenge to get consistent, comparable reviews if they come from all different people. Consider that it is not too helpful if everyone reviews his own favorite lights and you end up with a long list of "this is the best light ever" reviews. However, the forum is full of valuable knowledge and I think you are on to something here anyway.
Flashfan, this may be similar to what you said above, but I'd like to see a master index
of flashlight models that serves to link the existing excellent reviews from the various review sites mentioned above (this may exist somewhere, but if so I am unaware if it). It could also contain the original reviews you are talking about to supplement existing reviews and fill in the gaps of missing models and modifications.
Actually, if you think about it, this entire fourm is relly a treasure trove of various mini-reviews (some full reviews) that crop up in the various threads and come from a large number of different people, usually in the form of "I have the light you are asking about and these are the things I like and don't like about it compared to this other light...". Your idea would be a more formal version of that and easier to access quickly. Very good idea. Good luck.