I do dailies when I need to (the easy SSO ones - about 6-7 of them) on one or two of my sets of my 5 level 70s. So that's about (6 quests x 10 toons) 60 dailies done in about an hour when I want to , not bad.

Still, I only do them when I need the money. Saving up for WotLK? No thanks. We are getting only 11g or so per daily now. At 80 we'll be getting 50g or so? And Bliz will make the stuff you want in WotLK based on the 50g per daily rate.

Why work really hard now to save up cash that won't be worth much in the future?

It's like living in a hyper-inflation nation in Africa where you better spend any money you have on bread today because every week you save your money is worth 10% less.

You have 3 options in WoW at this point: 1) gear up your 70s, 2) make/save gold, or 3) level up alts. All the work you put into the first will be completely worthless when WotLK comes out. Working on the second will be hugely devalued when WotLK comes out. Working on #3? That's something that you'd have to put the same time and effort into later when the expansion comes out. Pretty obvious to me from an ROI (return on [time] investment) perspective.

That all said, I'm enjoying heroics about half my play time because ... well, it's just fun today.