iWork does have a product key, you do need to activate, but do not need to register the copy. And yes, it is an honesty system from Apple as you can physically run your iWork single license copy on multiple machines and update without any issues whatsoever. That of course does not make it legal, but then installing OSX on a Dell is not in accordance with the software licence either.
Mini 9, 64GB Runcore, 2GB RAM, Triple boot OSX 10.6.3, XP, Ubuntu Netbook Edition (via Wubi) 3G w. A-GPS
. BIOS A00, big Chinese battery.