While there have been noteable cases where sensitive information has been obtained by Internet crackers and criminals, the TJX security breach has started impacting folks and it's a good practice to always check banking and credit card statement vigilently each month.

TJX Security Breach - Stolen Credit Cards are being used
 http://www.eweek.com/article2/0,1895,2087760,00.asp

QUOTE: Banking industry officials in Massachusetts are reporting that a string of local companies have already observed fraudulent activity related to the massive data breach reported by retail chain TJX Companies on Jan. 17.

Unlike many other highly publicized data losses reported by organizations such as the United States Department of Veterans Affairs, which have not yet been traced to any criminal activity, the information stolen from TJX during two specific incidents in 2003 and 2006 has already been put to use by fraudsters, according to the MBA (Massachusetts Bankers Association).

The MBA reported on Jan. 24 that several banks in the state, which is also home to the TJX corporate headquarters in Framingham, have reported incidents of fraud specifically related to the information that was lifted from the retailers' IT systems by unidentified outsiders.