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Terms from PNC website:
To receive this one-time statement credit, you must apply for a PNC Bank Platinum Business Rewards MasterCard by 3/31/07, and once approved, activate and make the required $500 in net purchases by 6/01/07. Six to eight weeks after that, the statement credit will be posted to your Account. This offer is subject to credit card approval and your new PNC Bank Platinum Business Rewards MasterCard Account must be open and current to receive the statement credit. This statement credit offer is available only to new PNC Bank Platinum Business Rewards MasterCard accounts booked through this special offer