From an updated press release on the site:

"You will be able to see the hand-typed cards that John diligently typed for every album in the collection, the record sleeves, as well as listening to tracks via spotify and itunes where available."1

I'd guess most of John Peel's collection would unfortunately not be available on itunes or spotify. Looks like there will be a listing of the albums/singles with notes, album cover and a link to buy elsewhere. Not the digital copy so many would very much prefer.

The unreleased or uncut Peel Sessions would be of huge interest to many, if those are to be released, but also many of the rare & early tapes, singles and albums of influential, famous and not-so famous bands.

1 - http://johnpeelcentreforcreativearts.co.uk/index.php?option=...