Hi,
Like many other paladins, I respeced Ret to lvl in Northrend. If you want to do the quests it's definitely the fastest way. But since there is a huge lack of healers and tanks, I barely play the DPS role in instances.
Most of the time I'm the healer and i'm amazed by what I can do as a ret with a good healing set. JotW gives me plenty of mana and an instant FoL 25% of the time, when I crit with FoL I leave a noce HoT on the tank and my HL heals for a lot !
With my T6 prot set I can really easily AoE grind the 5 man instances as the main tank, I take quite a lot of damage, but nothing a healer cannot handle.
Future looks promising for my ret spec :-)
What about you ?