Good time to invest in the DOW?

Well, the market closed under 10K (DOW), for the first time since February. I'm getting more and more antsy, especially because I left lots of money on the table when I didn't invest as much as I should have when the market was at 7K back in '09. If we go back up to 11K, thats a possible 10% that we're eyeing, although we've ridden up to 11 and back down twice already. What do you guys think? I'm usually big into ETF's, as I don't have much time to hand pick stocks. What do you guys think? Will Europe keep us sinking lower?