It sounds like this new Minnowboard Turbot Quad Core from ADI will be out in December for around $190.
“ADI Engineering announced an upcoming Quad Core varient of the MinnowBoard Turbot that will used the E3845 SoC. Compatible with the existing MAX and Turbots this brings a new level of performance to the SoC for those computationally expensive tasks.”
For more info, click on the G+ link in the above tweet, WordPress appears to discard G+-based URLs today.
From the Netgate pre-order page:
Improvements over MinnowBoard Turbot Dual Core
* Twice the core count. Higher clock speed.
* Over 2.5 times FASTER than the MinnowBoard Tubot dual core.
* Better Ethernet! This board has Intel i211 vs Realtek NIC.
* Fansink keeps it cool! Suitable for higher temp applications.
Nothing here yet AFAICT: http://minnowboard.org/