In reply to cliff shasby:
Heading home now and watching the time pass at Oslo Rygge airport.
Yesterday was last climbing day and we managed to do Fabrikkfossen and although it was a bit wet there was plenty of ice for climbing and belays. Route was climbed to top.
Temperature as of this morning when leaving was -8 and has been around this temp (sometimes as low as-15) for 4 days.
If the cold stays then it won't be too long before the majority of climbs are climbable. I went to upper gorge on Monday and there was stuff that could have been climbed but I didn't think it looked great. I'm sure that since then it's an improved picture.
Not sure about the other areas as asked.
All I can suggest is to keep monitoring the temperature. If it stays well below 0 then I'm sure that it'll be great in Rjukan within a week and even now there is some good climbing to be had.
If you decide to go out hope you have a good trip