Heap of Atoms is a plugin for pasting your awesome stuff to refheap.
Two commands: create a paste, create a private paste
You can probably figure out what they do. If you have something selected, that gets pasted otherwise the entire buffer.
One thing you might not expect is that Heap of Atoms doesn't actually use the grammar you have specified, it simply passes the file extension you're editing on to refheap. The reason for this is because not all of the grammar names match what refheap expects and sans a mapping of all of them to the Refheap names.