I remember seeing a very handy plug-in on Adobe Studio Exchange a while ago that allows you to grab a whole gaggle of unjoined lines (of the sort one gets from exporting a pdf or eps from a CAD program) and join all of their overlapping endpoints in one operation. I don't see it there now, though. Anyone know what I'm referring to, and where I can find it?

(Sniping aside, it seems to me that however Adobe chooses to implement its standard path joining operation, this feature really ought to be built into the program.)