Just another thought. It could be nice to add a new (optional) field to the review form on what version you are reviewing. Again, I do not know how you would allow reviews for versions that are not currently available, but just a thought.
This idea came to me because while reviewing the CCK Wizard module (which is still in development), I thought that if the module developer updated the module, then my review will probably no longer be valid.

Version data is too noisy to count on.
John - March 26, 2008 - 15:56
That's something I thought about with the initial design, but decided against.
Some modules push a new dev snapshot every day, without changing the actual version tag. What you get with the dev release today could change tomorrow.
Knowing what version was reviewed sounds good on the surface, but because there is no real standard on how version numbers are used by maintainers, it's not reliable enough to base a decision on. For that reason, I've decided to leave it out.
There will be certain cases where version info could be very useful. In those situations, I'll leave it up to the reviewer to incorporate the details into their review.
Overall, I think the 'review date' gives a better indication as to how relevant the review is. As time goes on, I may implement a system to give higher weight to recent reviews.
I Agree
Ultimateboy - March 27, 2008 - 02:02
I agree. The more I think about it, the harder this would be to implement. However, maybe something as simple as 3 choices, 4.7, 5.x, 6.x would help.. Since a lot of modules have different functionality for each version.
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hard work
palik - March 28, 2008 - 01:56
but 'reliability' is often changing (up and down) with new versions, because of bug and feature issue closing,
there is no way to assure that review will be actual after some time, so maybe at review creation user should choose drupal version and module version that he is using (e.g. 5-2-x).
i think it would be more clear for future readres than date.
regards