How to copy from/to the tmux 'clipboard' with shell pipes?

When working in a shell environment I run fairly often into the need to copy 'intermediate pipe output' around (eg. from/to already running editors, to other shells, other machines, etc.). When in a windowing environment, an easy (and generic) method to solve this is often via the system clipboard, eg.: * X11: ... | xsel -i / xsel -o | ... * OS X: ... | pbcopy / pbpaste | ... How can I get similarly convenient behavior using the tmux copy/paste facility?