Read/Write Splitting with MySQL-Proxy
MySQL-Proxy, announced in June, is a binary application that sits between your MySQL client and server, and supports the embedded scripting language Lua.
Very cool — now can I please have the same thing for HTTP?
More on InfoQ.
for apache, what about mod_wombat? and in lighttpd, mod_cache is scriptable with lua.
Both good hints, but I was looking for something that acts as a (transparent) proxy and is scriptable.