I've mentioned him before. Gizmo Richard, who puts out a really good computer newsletter. Here's his current edition.
You're safe if you decide to subscribe to it. He's not a spammer.
An eclectic newsletter that I enjoy is produced by a husband and wife team out of the Lone Star state, Don's Patch.
I tend to visit the same websites day after day. Subscribing to newsletters like these helps me get out of that rut and can lead to some interesting pages that I would have never found on my own.