The lack of multitasking is actually an awesome usability decision by Apple for the iPad (ofcourse it has multitasking on the tech level, otherwise you couldn't not operate it with touchscreen while you listened to music and see the app respond to what you do);
The iPad is not made to be a full blown computer, allthough listening to music while doing anything might be nice while reading a book.
Apple isn't that bad. Actually I wished it would get a monopoly on operating systems for a while and then collapse after a while (and it will)
Is Webkit2 GPL'ed, btw? It is build from the ground up...
Perhaps you are not aware that the iPhone OS 4.x was recently announced, which will enable multitasking?