Take a few minutes and cleanup the security on your wireless network: Ars Technica: Security Practicum: Essential Home Wireless Security Practices.
Sure, it's inevitable that your new computer immediately becomes obsolete. But I didn't think it would happen within DAYS of buying my new powerbook. Believe it or not Apple has a policy covering just this situation and they were good enough to give some cash back even though I was a day outside the window. No chance on swapping my pb for the new 1ghz model with the new superdrive. Note to self and other future Apple purchasers: don't custom config the machine (adding memory is a custom machine) it seriously reduces your options for refunds/returns.