I'll be adding a few more links to the sidebar soon, but until then, these websites and blogs are definitely worth a look.
BBC2's Culture Show featured a good segment on the British Library's Evolving English exhibition which you can find on YouTube here.
Ben Zimmer's On Language column in the New York Times is always a good read and he has recently looked at youth slang and the growth of the word relatable (which even as a self-proclaimed anything-goes-trendy-leftist-linguist bugs me more than I know it should).
Dennis Baron's The Web of Language site is new to me so I haven't got much to say about it yet, although I'm reading his A Better Pencil at the moment, a book about technology and writing, which is interesting for anyone looking at multimodal forms.
Stan Carey's Sentence First is already listed in our sidebar links, and it's a very informative blog.
Also, here's a link to the Daily Telegraph's review of the British Library Evolving English exhibition.