I have wondered since if any of that material has been released in a different form since. Namely, whether any Them Crooked Vultures or Black Country Communion songs are from those sessions, or are based on material from those sessions.
We now have a part answer. In Black Country Communion's upcoming release, BCC2, the song Save Me started as an idea from those sessions. According to Jason Bonham:
There's a song that started off as an idea that I worked on with (Jones and Page), so I was happy to finish it off with this band and have it come out. It's called Save Me. You'll notice it in the riff. You'll hear a slight Zepesque riff ... it's got a definite feel to it.
You can pre-order BCC2 at the band's website.