Thanks for pointing out the shoreleave-remote-ring repository, I didn't know it existed!
Looking at the code the major difference is that in lib-fetch there is both server side and client side code included.
With shoreleave-remote-ring you'll also have to include shoreleave-remote, but that shouldn't be a problem.
Also shoreleave-remote-ring only requires ring while mine requires compojure too.
Truth be told, I don't want to be maintaining anything when a good solution already exists (aside from my lazyness there is no need to add more libraries causing more confusion)... so eh, feeling kinda dumb about it, but I'm going to remove mine.
Well at least Tim, me and other mailinglist readers have a good answer now :-).
Thanks again for pointing that out,
Jan.