1099 vs. w4 wages - can my taxed money make up for the untaxed?

From January 2010-August 2010 I was a 1099 employee with no taxes taken out of my check. Normally I would pay them at the end of the year. I got a new job and am now W4 or whatever you call it…I am taxed and claimed 0 so they take the most out of my check(I think). I got my first check and frowned when I saw how much taxes were taken out. Will the taxes they take out help cover what I will owe at the end of the year?