Just got an email back from Astak, looks as though the 5" and 6" ones are due July/August because they're making button changes. Full info on their website next week. They're pushing retail sales first rather than direct selling so Bob was apologetic that he couldn't just add me to a pre-sales list. Bah! He also suggested dealing with Netronix since they're the official distributor for Asia/Australia. But since release is months away... I'll wait.
Unless someone can get to the IDPF Show and mug one of them for the sample models