hee hee
Y'all are making this Apple girl happy.
A couple of things to point out...
Be careful with getting an Auto/Air adapter. Most that are compatible with Apple portables provide 45 W of power, but the 17" needs 55 W. Make sure you verify that the adapter is compatible with the 17" model.
Get an iPod!
Watch out for the iTunes Music Store! It's addictive.
Get AppleCare. Normally, I'm not all that keen on extended warranties, but for portables, it's worthwhile. However, if you get regular insurance for your laptop, it may be overkill. If you're a recent switcher to the Mac platform, it's good to have for the three years of free phone support, which is, according to the ratings, quite good.
We've got another nifty device now to go with your Macs: the iSee webcam. People are starting to use them here around the office, and they're coming in pretty handy for videoconferencing. I think all managers of a certain level and higher have to have them. My boss' boss has one.
Consider getting a bluetooth card for your PDA, if you carry one. That way you can sync easily. Also, a Bluetooth cell phone is very handy. It can be used to connect to the Internet remotely, without wires and dongles. Very cool.
Another thing that's good to have is a cover that goes between your display and your keybard, to keep the dirt oils from your keys from getting on the display. These are the nicest ones I've come across:
http://www.radtech.us/screensavrz-laptop.html
The only other thing I would suggest is perhaps to set up a USB mouse and keyboard and perhaps a display, if you have one lying around for the office you happen to spend the most time in. They say it's ergonomically better to use a regular keyboard and mouse when you can. Laptop keyboards aren't the most ergonomic. Along with this, a second AC adapter can be handy: one for your home, one for your office or the road.
I have an iBook and sometimes think about whether I need a spare battery, but I can make it through at least one and a half DVDs on a plane on one battery, so I've skipped it so far.
You can explore various software options at Versiontracker.com.
Also, our online store has some other nifty gadgets:
http://store.apple.com