I was tinkering around looking at Ethernet MII PHY chips, and I came across one that sparked an interesting idea in my mind.
The Micrel (owned by Microchip IIRC) KSZ8864CNX/RMNUB. It has two MII interfaces and two PHY interfaces within it, along with a fully managed switch (which does VLAN tagging and everything).
For the uneducated, an MII interface connects to a PIC32MZ, and a PHY connects to an RJ45 socket (via magnetics).
That means you can have two PIC32MZ chips running LiteBSD connected together through ethernet, along with one or two ethernet socket(s).
Instant LiteBSD cluster
With two RJ45 connections you can link multiple boards together - instant LiteBSD *big* cluster