The Nexus 9 is shipping now – it’s listed as in-stock and shipping within 1-2 days for its ‘Indigo Black’ and ‘Lunar White’ color options. The ‘Sand’ color still only says “coming soon”, however. Also, just the Wi-Fi only variants are available – you’ll have to wait longer for LTE.
The Nexus Player for its part is also no longer listed as a pre-order, but you still won’t be able to get it right away: Google Play notes the devices as shipping within 2-3 weeks.
Hopefully they won’t all run out as quickly as the Nexus 6 did.