H.B.
I second Mint.com
The only thing I wish it had was a way to add cash. Since I so rarely spend actual cash, I just split my deposit. (say I have $40 and spend $10 and then deposit $30. I adjust my deposit to $40 and then the missing $10 is put in a spent category.)
I like to be detailed, where as my friend just keeps it simple. (I break a receipt down into specific categories while my friend is just fine with things being put under household. If a receipt is split say household and food, the tax just goes to one category since she doesn't like to do the math.) Try it out, I think it could really help.