This WordPress blog contains a page giving details of the plugins used on the blog.
This approach has parallels with my blog experiments; my approach has been to provide a description of the reasons for the experiments and the pros and cons of the solutions, whereas this gives a factual descriptions of the solutions deployed.
I think a combination of both approaches can be useful. In particular, it can be useful in providing documentation on the tools which are being used: for example, in planning migration of the functionality of a blog to a different platform or in looking to preserve the functionality of a blog. This is something I’ll look at providing in the future.