I do have one quibble, the indicator of the space available does not estimate the remaining time available.
Hi osmosis (and everyone else!),
One of the big challenges with providing the "hours" remaining is exactly what you stated - it's simply an estimate. Under 00.13, the true amount of space remaining varied greatly depending on the channel/content you were recording, along with the reserved part for LOD.
As we look to future broadcast methods, it becomes impossible to provide an accurate estimate of the true number of hours that could be recorded. SD, HD, MPEG4, 3D, etc. all vary dramatically in terms of how much space they take up.
Additionally, in order to fit the bar in the PVR List (which was a very popular feature request last Fall), it needs to be more compact.
The PVR is still self-managing, and will still automatically delete the oldest unprotected recording when space is needed. As you spend time with the software, you'll start to get an idea of approximately how much space gets freed up when you delete a recording. It's nice to now have that instant gratification, too