If this is your primary home and it is used for personal (not rental) purposes, then you may not deduct these expenses, as home improvements for personal property are not deductible. However, you may add the cost of these items to the "basis" of your home. When you sell, your gain will be calculated as the difference between the sale price and the basis of your home, so these improvements will effectively lower your gain.
Unfortunately there are no new tax laws for 2008 that allow a deduction or credit for these items.
Unfortunately the credit for energy related improvements for personal homes was not extended for 2008, but is available in 2009. I have a lot of clients who have this problem and I agree it is very frustrating.
Please let me know if there is anything else I can assist you with.