If I remember correctly, you are or will be a FMG (Foreign Medical Graduate). The unmatch rates for US FMGs the last three years has been 52.6% (1999), 48.6% (2000), and 47.6% (2001). The umatch rates for Non-US FMGs are 67.8% (1999), 61.5% (2000), and 55.2% (2001). This data was obtained from the National Residency Matching Services' website.
I am not really sure what your question is exactly. Yes, I have met people who did not match or had trouble getting residency. Often, unmatched applicants wind up scrambling into positions in Internal Medicine or Anesthesia in less than desirable locations and programs.