Sorry if this has already been covered above, but...
the 1977 demo is available on a very useful semi-official CD (I bought mine in HMV!) called "Warsaw" released on Movie Play Gold (MPG74034) in 1994. It includes the whole of the 11 track aborted 1978 LP recorded at Arrow Studios, "As You Said" from the FAC28 flexi and the 1977 demo (Inside the Line/Gutz/At A Later Date/The Kill (not the same as the song of the same name on "Still"). It also includes a fifth song from that demo called "You're No Good For Me" which isn't mentioned in Mark Johnson's book as being part of the session. Anyone got any ideas where this came from?
The missing track from the Piccadilly radio sessions ("Atrocity Exhibition") and the unreleased versions of "Transmission" and "Novelty" from the first "Transmission" session which spawned "Dead souls" and "Something must break" are on another semi-official CD called "Digital Glass" (pur-leeeze!) on Punk Vault PVCD 1001.
As for the final Genetic tracks, "Digital" was allegedly not completed, but I have a CD including a different version of "Digital" from the Factory Sample one, which does not appear to have come from any of their other known sessions, so this mightbe the Genetic version. Anyone confirm that it was completed. As for the Genetic "Exercise One", the same CD has a track claiming to be that, but actually appears to be some kind of live recording (crowd noise is a bit of a giveaway!), so I don't really know if they have been sneaked out. Martin Rushent always swore he would never let them go to bootleggers, and the tracks on Heart & Soul appear to be the first anyone ever heard of the session (outside the band, obviously). Also, by way of train-spotterish interest, the Genetic "Transmission" appears on the 4CD Rough Trade story box-set (Mute) but is mistakenly credited as the normal Hannett version.
The only other tracks I an think of not released officially on CD are the extended (i.e. padded) 12" versions of LWTUS and Transmission from the original factory 12"-ers.
Phew!