So Google seems to grab a snippet from each page, as I have set an About.html consisting of global links, then sub forum descriptions there is pretty much the same snippet of text for each category. I don't know if there is anything planned for the meta tags but I would like to put forward this idea.
Similar to the mods.txt or locked.txt you create a basic text file named meta.txt, inside that file you would place something like:
% Suggested Meta.txt "foo" "bar"; "bob" "cat"; <meta http-equiv="refresh" content="30">; %
These then get transformed into
% Magically Generated Stuff <meta name="foo" content="bar"> <meta name="bob" content="cat"> <meta http-equiv="refresh" content="30"> %
This would allow people to set the descriptions/authors/keywords or page refresh times as required.
I'm not sure how well line three would work with the magic side of things, but its an idea from someone with only basic HTML knowledge.