Conflicting messages: Powerbook G5 in Q2 or no?!

Over the weekend we reported that Taiwanese manufacturer Quanta has received orders from Apple to ship Powerbook G5s in Q2 2005. The other big surprise from that news source was that iBook G5s are to be expected in Q2, as well.

And yet, other sources still say
not until at least September
'05 for the Powerbook G5, while others seem to indicate this drool-worthy portable is even farther off than that,
due to heat issues with the super-smokin' (literally!) G5 processor. They'd better hurry up, because
Intel is breathing down Apple's neck with their new Sonoma line of processors.

Either way, we want the straight dope. If any of you have relevant information on when we can look forward to scrambling for our credit cards in a mad dash to order one through the Apple Store before they sell out, please let us know. ;)