Apple has launched a new promo called "Clean as a Whistle." The promo basically allows you to save US$40 off of Norton Personal Firewall, when you buy Norton Anti-Virus from the Apple Store. From Apple:
Buy Symantecis Norton Anti-Virus directly from Appleis online store and get Norton Personal Firewall directly from Symantec for only US$29.95 (a US$40 savings). Offer good through March 29, 2003.
Note that this offer requires you to order Nortan Anti-Virus from Apple, and Norton Personal Firewall directly from Symantec. You will be asked to input your Apple Store purchase code when you order from Symantec. You can find the deal and the proper links at the Apple Store Hot Deals page.