I know it is a little past the middle of the year but I would suggest everyone annualize your income & deductible expenses (including exemptions, itemized deductions, & other) use the 1040 tax rates and compute the tax for 2007. Annualize your witholding & make adjustments to your W-4 if you are having too much or too little witheld.

We had a child this year & between the credit and the exemption it made a big difference. I would rather get it now instead of next April...

Just my 2 cents.