Yup ... I was a linode customer but I set up my instance using the slicehost tutorials :\
I totally agree. Those articles saved me a lot of time and were very helpful.
I don't use Slicehost anymore but I use their articles to setup any Linux machines. I am so dependent on these articles that I have saved an offline copy of these articles using HTTrack.
I have used also used their docs as well, while never having actually been a customer. Some of the best generalised VPS admin resources for newcomers out there, it'd be tragic if it went.