I just got a large (longer than A5) cardboard piece of marketing material addressed to me personally from Slingshot.
It's styled as an OSX popup titled "Attention: Mr Rich, You are currently paying too much for your broadband. Do you wish to continue being overcharged?"
I'm curious as to where Slingshot lifted my details. I've never been a customer of theirs or signed up to any lists. Are the purchasing marketing databases from some other dodgy ISP selling details or something?