In August and September of this year (1998), RCA re-released a few old JD albums. Here's a press release, of sorts, with the details (note that, while written in the future tense, all releases described are now out, tho you may have trouble finding RMX-Mas before the holidays).
Rocky Mountain Christmas
The re-release of Rocky Mountain Christmas will have 5 bonus tracks: "Jingle Bells" from Whose Garden, "White Christmas" from 1975 (previously unreleased!!!!!), "Perhaps Love" (solo), "The Music Is You", and "Dreamland Express" (???) as bonus tracks. JD will have side 1 of Whose Garden, and Spirit will have side 2 of Whose Garden as bonus tracks, excluding "Jingle Bells", which was put on the Christmas CD.
And September 29 is slated to bring Forever John, consisting of 12 unreleased performances, 10 of them never-before-heard Denver songs.