Paste is a pasteboard/pinboard running on the social networking platform pnut.io. To create a new paste, you will need a pnut.io account. Click the Authorize button on the home page to log in to an existing pnut.io account.
Each paste has a public link for sharing that can be viewed without logging in to pnut.io, as well as a "private" link for logged-in users which will display both the selected paste and a list of the logged-in user's recent pastes. These links are provided to the user at the time the paste is created. The Repaste button does not alter an existing paste; it copies the paste to your paste form, where you can create a new paste under your account (regardless of the owner of the original paste). You can edit your repaste before pasting it.
More information and source code is available at github.
For more help, please contact @mcdemarco on pnut.io, preferably by private message.