Flash Exposure Lock with Canon D60

Has anyone tried using the Flash Exposure Lock function with a housed D60? I've just been playing with the function on my camera, and got to thinking that it might be helpful in properly metering a subject.

Anyone with any experience or thoughts on how this might help or hinder?

Thanks

Tom

This would only work with a housed Canon flash (which we tried out in Kona, last November), since those are currently the only flashes that work with E-TTL.

Other strobes only work in manual mode with the D60, so flash exposure lock isn't that useful...

How did you like the housed Canon flash ? Is it worth the money?