Thoughts on MySQL Proxy

I am reading up on MySQL Proxy and find it to be very interesting. It looks like the proxy is a network layer between clients and servers. A client may think it is connecting to a single server but in reality, the client's query could be running against multiple distributed servers. Another nice feature is the ability to monitor and secure data at the query and result level. A client can send a query and the proxy can log that query. When the results come back, the proxy could strip out data (or mangle it) before it goes back to the client. That would be a nice feature for protecting data during development and testing. The developers and testers can run their queries against production and the proxy could mangle sensitive data on the way back out. It's only compatible with various Unix/Linux flavors at this time so no Windows. That's probably not that big of an issue. I don't know anyone running MySQL in Windows in production. It's pretty slick. I need to do some additional reading before I can start playing with it.