There are some very good blogs. And hackers.
The first hacker I will mention is Brett Terpstra. He is the author of nvALT, a Notational Velocity alternative (yes, I’m using with. With a Simplenote account, you get a fantastic tool for notes).
He is also a big fan of Pinboard (like me). If you want search your Pinboard bookmarks with Spotlight, you must read this post.