My paladins hit 70 yesterday. I did half of 69 while in Mechanar and Botanica. Botanica was very easy and went smooth.

I dinged at the end of the instance and got the 70 skills. I picked up vengence on my 4 rets. I did some testing in outlands real quick to see which seal was better - vengence or command. I found that command is much better for low health mobs. Unless it was a long battle with a high health boss, vengence cannot hold a candle to command. Not to mention I get 8% mana back when I judge command.

I could see vengence being better on a boss fight where you can actually get 5 stacks going.

I also tried heroic ramps for shits and giggles and could easily see myself clearing that instance. But now that I'm 70 I'll do some quests in northrend and finish netherstorm (never even started it yet!).