Redis 2.6 "is near" and now feature frozen
Redis is a RAM-based, persistent, data structure server written in ANSI C, which can be networked to replicate data in a master-slave configuration. VMWare sponsors the Redis development work of lead developer Sanfilippo and fellow developer Pieter Noordhuis.
The headline feature is server-side scripting using the Lua language; according to the documentation the eval function will allow Lua scripts to be executed in the server. Those scripts will be able to call Redis functions using a .call() or .pcall() method and data types are automatically converted between Redis and Lua.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump