Sorrow's Furance Quests: Repeatable?

Hey Guys,

Sorry if this is in the wrong section but I couldn't think where else to put it. I searched Guru and Wikki and didn't find an answer, or atleast one which gave me confidence, so I thought I would ask here.

Are the Sorrow's Furnace quests repeatable? Or are they one time things like most other quests? I think I remember doing Orozar's quests numerous times before factions, althought I'm not clear on it.

Do you have to abandon the quest before accepting the second reward or how does it work?

I ask because I love Tyria and I thought Sorrow's Furnace would be a fun place to get exp on my survivor warrior. If I can repeat the quests I know where I want to play until GWEN comes out.

All Sorrow's Furnace quests are repeatable.