In following the links that have been supplied by the posters, I came across this 'news release' from 2003. I don't know if it might help clarify a couple points: IRS Announces Revisions to ITIN Applications
It appears in 2003, the IRS cracked down on people getting ITIN numbers for 'identification' purposes instead of for use on tax documents/forms which is the only time it is supposed to be used (according to the release). According to the 'news release', the ITIN has to be applied for by attaching the W-7 and proof of identification (as spelled out on the form) to a Tax Return. The IRS will not issue the ITIN until the Return is filed.
