Do they all have the exact same size, but different file names?
What types of files are they? WMV, ZIP, EXE?

Do any patterns catch your attention, such as all the sources being Shareaza
or Limewire, or the same IP addresses appear often in the list?

You have to provide all the exact details or we cannot determine
which worm or spammer is involved or if it is a new problem. There are a lot of
bad files out there, and accurate information is our best defence.