I second your request. But, sorry, the fact is that I doubt much will happen. .. life is tough.
Why? Because this is like tags in forums, its an idea whose time seems not yet to have arrived.
For instance:
Try to find this post by searching for "feature requests". .... oops, we didnt use that phrase, or anything like it in our posts. 3 months from now, this post and your request will be completely irretrievable...lost. The same principle applies to blogs, and with a blog, you can be most certain that the blogger would enter tags to make the info findable if he/she could.
Ive been advocating for tags in forums across the Internet... no luck. Ive brought this up with core and 3rd party developers for not only DNN, but for a couple other content management systems. I always get told its a great idea...or even that they are working on it, then years pass and nothing happens. For some reason there is a mindset that (except for email) one has to choose iether tags or full-text search, and not both. As a result, when forums get large, much of the content is just never retrievable. So much good info goes to die in forums, never seen again, because it deals with something where the appropriate search terms are ambiguous. As blogs become a larger store of truly valuable data, the same thing is going to happen. Ditto with wikis. It isnt just DNN, its web wide.