In my terminal, I’ve configured the following alias:
readlater="offpunk --fetch-later `xsel -p`".
This means that if I type "readlater" in any terminal, if there’s an URL in my clipboard (or several), those are added to my offpunk reading list.
So when browsing with firefox and finding something that looks interesting, I simply copy the url then type "readlater" in any available terminal.
Yep, #offpunk completely replace Pocket for me ;-)