Chris,
The deductability of contributions to the organization is dependant upon the organization obtaining a 501(c)(3) determination from the IRS. You must file an application (IRS Form 1023) for 501(c)(3) status with the IRS. If the Form 1023 is filed within 27 months from the date of incorporation of the organization the 501(c)(3) determination will be retroactive (meaning that the recipient of a such exempt status will be able to offer tax-deductibility of donations back to the group's initial incorporation date). Generally, if Form 1023 is filed after 27 months from creation, the effective date will be the date the application was filed. Take a look at Publication 557 on the IRS's website for more information. Good luck.