Just about Cain being at the waypoint, I read the (11 page, gee) thread on Battle.net about that, GFraizer said that they were using a "special debug" version of D2 where weird things happen, as he described it. So I dunno if that'll be permanent or not.

I'm not really impressed by the jewel actually, considering I don't even bother with them :p but the fact that they're adding in new uniques is good to see.
Interesting thing I read on Bnet too, look behind the item's description box. Green ancient armour. New unique? Maybe. :) So much speculation on the Bnet boards it's sickening though :p