Are any instanced quests/dungeons working currently????

I keep getting d/c no matter which I try.

I think so... at least on Sargatanas I haven't had any problems. In the last few hours I've done a dungeon, a trial and mulitple instanced battlefields without any issues.

Edit: Nevermind other people seem to be having issues so it's not just you.

I was on duty finder and can't find a party as a tank?

Yeah, the duty finder is messed up and you'll get kicked with a 90000 error. If you are lucky you can get back in but some people, like me, are getting a 10102 error when trying to login to the character that got disconnected.