Adobe onlocation is killer, if you have a dedicated datatech using it and a system worked out with the camera ops where you're constantly switching flash cards. Having someone enter all that data in fresh is priceless when it comes to post, and you have another set of eyes looking at meters checking if the good tales are out of focus, over/underexposed etc.
Ideally, this is live but since most of us are using cameras that record to some sort of flash memory now, the cameras don't have FireWire ports so this is how it is.
I wouldn't recommend it if you're a one man crew, it's one more thing to steal your attention from places that need it more.