Ghost is finally launched for public a few days ago, and also because I’ve registered in the early bird mailing, I get the notification emails too. 
This new blogging platform is running using Node.js, and we don’t need to install webserver to run it. Just install it using npm, configure, and run, we have a ready to write blogging website.
I’ve set my domain, www.erawan.me, which is powered by Frontrangehosting KVM VPS for running Ghost on it. If you want to purchase a VPS from Frontrangehosting, you can use this coupon to get 5%off : D6XCHC1WBU8F
Digital Ocean and Rackspace also have a ready to deploy droplet image with Ghost.
is it safe, from which platform it come from?
It’s using/running with Node.js