I have done just that. I'm upgrading a rusty old Raleigh Twenty, and want to keep the original fork. But I don't want to keep the original brakes, which are terribly rusty and not great to begin with. The Sturmey hub doesn't require any special braze-ons etc. on the fork; it comes with a clamp that goes around the left fork blade. The clamp fits the Raleigh fork very nicely, but it might not work on thicker fork blades. The hub is nice, the brake is strong enough, all in all it looks nice. Yes, it's heavy, but a heavy hub isn't such a big deal.
I got the hub brand new, and it came nicely packed in a SA box, but included no literature: no owner's manual, instructions, list of parts, warrantee, whatever. It came with a double-ended cable in a black housing; you don't need to order one separately. At the hub end of the housing there is a long barrel adjuster. The lever end of the cable has a standard upright-style cable end. Also included was hardware with which (I think) you could use a road-style brake cable. The hub bolts on; no QR.
I haven't finished wiring up the lights yet, so... more later!