It'll be sorely missed. IMHO, BSDi was the only implementation of ANY operating system that had a decent TCP/IP stack interface.
Proof? Running DNS on any operating system, MS and Linux included. While every other OS operated at 50% or higher loading while serving 30K users, BSDi barely hit 4% consistently.
Hopefully the code will be made available to other projects (not necessarily open source) to that we can continue to enjoy the level of performance provided by the current versions of BSDi).