This excerpt taken from the XIDE 8-K filed Aug 31, 2007.
Obtaining a Number
If you do not have a taxpayer identification number (or TIN) or you do not know your number; obtain form SS-5, Application for a Social Security Number Card (for resident individuals), Form SS-4, Application for Employer Identification Number (for businesses and all other entities), Form W-7 for International Taxpayer Identification Number (for alien individuals required to file U.S. tax returns). You may obtain Form SS-5 from your local Social Security Administration Office and Forms SS-4 and W-7 from the IRS by calling 1-800-TAX-FORM (1-800-829-3676) or from the IRSs Internet Web Site at www.irs.gov.
To complete the Substitute Form W-9, if you do not have a taxpayer identification number, write Applied For in the space for the taxpayer identification number in Part 1, sign and date the Form, and give it to the requester. Generally, you will then have 60 days to obtain a taxpayer identification number and furnish it to the requester. If the payer does not receive your TIN within 60 days, backup withholding, if applicable, will begin and will continue until you furnish your TIN to the payer. Note: Writing Applied For means that you have already applied for a TIN or that you intend to apply for one soon.