Some new links to active Excel related blogs:
David Hagar has been active in the Excel community for many years, and has published the Excel For You blog since 2013. I was led to it by a recent post on a UDF generating a list of antonyms.: Excel For You.
Excel Matters is the blog of self-confessed Excel addict Rory Archibald.
My Spreadsheet Lab is run by Kevin Lehrbass and has a wide range of useful articles, plus numerous links valuable links.