I'd like to hear more about this tension you speak about so that I better address what you have to say. I've personally wrestled with mindfulness vs. action and one of the reasons I continue to practice mindfulness meditation is:
1. It's one of the most accessible types of meditation (in terms of finding a teacher) in the West.
2. Mindfulness and being grounded in the present moment has influenced the quality of my day-to-day action. While I won't go into detail, I feel as though my day to day actions have been guided by an increased sense of purpose and compassion.
I suppose I didn't make it clear enough in my post, but the practice over the year has led to a significant increase in well-being for me. Emotions, though they may be felt more strongly, also pass more quickly. Instead of a unsustainable happiness or Euphoria, it's more like a pervading sense of peace. I don't think I could have kept it up if this wasn't the case!
Love the discussion here and I'd be happy to add a few thoughts when I set aside some time to. Just wanted to point out that there's a much higher quality version of the video than the one I originally linked to in the post: http://www.youtube.com/watch?v=mCwC7XBQq9o