In addition to the post you linked to, here are two additional lists of popular low end VPS providers that were posted at LowEndBox:

http://www.lowendbox.com/blog/top-providers-2011q1/

http://www.lowendbox.com/blog/top-low-end-vps-providers-2012...

Here's a list of popular low end VPS providers at the LowEndTalk Wiki that is based on the same data used for the above lists:

http://www.lowendtalk.com/wiki/top-providers

Here are the popular low end VPS providers I made note of when I researched this subject recently:

http://buyvm.net/ (limited availability; see http://doesbuyvmhavestock.com/)

https://hostigation.com/

http://www.ramhost.us/ (owns http://tinyvz.com/ and http://tinykvm.com/)

http://www.securedragon.net/

In addition to LowEndBox and LowEndTalk, the following two sites had some good info about low end VPSs:

http://www.vpsadvice.com/

http://freevps.us/

I didn't end up playing with any low end VPSs because none of the providers I evaluated offer users the ability to clone VPSs, which is one of my requirements.