There is no N900 vs Pandora war going on, aside from Karel's personal unhappiness with Nokia not doing exactly what he wants. As far as the product readiness goes though, I have much more faith in Nokia delivering a new tablet than in Pandora folks delivering their device. Simply because Nokia has got ...mmm... a history of delivering mobile devices, including three previous tablet models.

PS: As to which one is "better" I have no idea, especially considering that neither is available yet. It probably depends on what you want from your device.