That is cause they patched the cracks. The Paradox BIOS crack is patched. The Year crack is patched. Now they just bug you every second of everyday if you have a illegal copy. Like most shareware does. So you wont be able to do anything in a Vista that isnt legit cause you will constantly be buggered by prompts to activate.
Bascially they are hoping that these new prompts will **** people off enough to stop pirating Vista. With being buggered every few seconds to activate i bet this will be a popular topic once SP1 hits.