It seems Toothpaste is a decent disk cleaning abrasive for removing minor scratches that may be preventing dvd/cd rom drives from reading it correctly.

I had two DVD disks about 4 years old that were scratched enough that I could only copy half of the 4.7GB off for both of them. About to throw them both out in frustration, I had the sudden idea of cleaning the disks with toothpaste as I have heard before, but had never tried it myself. Using a small cotton bud and a small dab of toothpaste (normal, no extra strength or special versions) I cleaned the disk in a inside to outside motion. After cleaning and the removal of the toothpaste (using just a small cotton bud with water), I dried it, stuck it in my machine and it read. No errors

I definitely won’t be using this disk again but i was able to extract the data and put it onto a new disk. All fixed.

It is here, well the Release Candidate is. Go to http://technet.microsoft.com/en-us/windowsvista/bb738089.aspx for information on how to download it.

Multiple download options are avaliable on that site quoted above, you can download a small patch which basically adds Service Pack 1 to Windows Update in Vista (a few prior updates were required which are like sp1 precursors), you can also download stand-alone packages or through TechNet assuming you have a subscription.

The whitepaper which contains an overview of changes in service pack 1 is avaliable here.
For a more in-depth look at the changes made between Vista and Vista SP1 check here.

To see the Vista SP1 release notes go here.
To view a list of hot fixes included in SP1 check here
I will note some other handy links and details about Vista SP1 when they become avaliable. Check back soon!