Simon is a prolific blogger, at rough look averaging 10-15 posts per month, and almost all of them are SQL, and not trivial posts either. He’s also the organizer of SQLBits in the UK – go visit the site, very nicely done. Definitely a guy you want to meet and/or connect with if you’re interested in all things SQL.
Updated: Sorry, here's the link (thanks to Steve for reminding me!): http://sqlblogcasts.com/blogs/simons/