First, I completely fail to see what this has to do with Secure Boot. If you're a System Builder and you're able to install Linux but are unable to turn off a checkbox in the settings, then you're a shitty system builder and deserve to have your business shut down.
Second, I completely fail to see what this has to do with Windows 8. The main complaint seems to be that the big OEMs are not shipping laptops without Windows being already installed. Wasn't this true with Windows 7 too?
It looks like the magic words "Windows 8 Secure Boot" were included in the headline and post only to gain HN karma points.
If you're a business and want laptops without an OS, you need to go to the ODMs like Clevo, Compal, Asus, MSI, Quanta, Wistron, Mitac, Arima and Invente. http://en.wikipedia.org/wiki/Original_design_manufacturer
They will happily sell you laptops in bulk without an OS installed. For example http://www.system76.com does exactly that.
Looks like the computer shops linked seem to just want Lenovo to sell them bare laptops so they can skim a profit by just loading Linux on them and then selling them for a higher price. Guess what, Lenovo doesn't want to increase their costs by creating a separate assembly line process which won't make them any money.
Asus sells barebones laptop kits if I am not mistaken.
It's interesting how yelling "OMG WINDOWS 8 SECURE BOOT!!!" gets you a lot of karma here even though it has nothing to do with the issue at hand.
The user is in control of the PC. They can load any key they trust or roll their own personal key and even remove Microsoft's key to prevent Windows from booting on their computer.
I don't see why tens of millions of PCs used by non-technical people should be susceptible to undetectable rootkits out of the box just to appease some stupid system builders who can't find the setting to turn it off in the BIOS menu.