Nail hit on head... this is an evolving project with a lot of people working on various aspects and niches. Your rather easily implemented improvements could jet SportsTalk into its' own category. I realllly agree with this part...

Remove H1 tag around "Trending: All Tags".
Currently there are two H1 tags for the home page. A page is meant to have only one H1, otherwise you confuse the search engines of what is the main subject of a page. Either change "Trending: All Tags" to a H2 or remove it all together from the home page (I would recommend the latter).

Great post Sir...