Has anyone made a scaled solasystem or a scaled earth?

No but I have seen a planet-sized camera

@zeropol the link is broken, you're gonna have to wait for pedro to release the newest version.

Yes there is RSS by AnotherFirefox.
But it was not updated recently.
old version
With this mod you should use the Real Engine mod with it, but I don't find the link. Also, while Im not sure, I think he is doing a rework of theses mods so we have to wait :)