S.3429: A bill to amend the Internal Revenue Code to provide for an increased mileage rate for charitable deductions.

Giving Incentives to Volunteers Everywhere Act of 2008 or the GIVE Act of 2008 - Amends the Internal Revenue Code to: (1) increase the standard mileage rate for use of a passenger automobile for charitable purposes to 70% of the current rate for business usage; and (2) exclude from the gross income of charitable volunteers reimbursements paid to them for the use of a passenger automobile for the benefit of a charitable organization.