You CAN claim her as a dependent if you are from India.
However, it is probably better to file jointly and choose to be treated as resident aliens for ALL of 2006. That gets you the double standard deduction of $10,300 plus BOTH personal exemptions of $3,300 each, for a total deduction of $16,900.
Since you BOTH have used up your five-year F-1 exemption, there is no need to wait. You can even file online if your wife has an ITIN or SSN.
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