Weaved is based in America and is a portal that can be used to access your Pi from anywhere in the world. You sign up for an account (which is free, as far as I can tell, but may have some paid components), install the software on your Pi and then configure which services you want to be made available. It’s an intriguing way to open up access, but don’t forget to change your default passwords! Read a tutorial here and read more information from Weaved here.
Thank you for the kind remarks. We at Weaved would like to encourage everyone to come to http://www.weaved.com and click on the “Downloads” link, which will take you to the page showing currently supported platforms (the list is always growing). Once you get there, click on the icon corresponding to your board and you will get a download link for the most recent version of the software (the Pi installer download referenced in the linked article is a few months old as of April 2015).