maybe if the neck was scalloped it could be used as a finger excersizer - but then it would be teaching you bad practice since you need such a soft touch on scalloped necks!!
It seriously makes me want to walk up to the workshop, pick up one of the many necks i seem to be saving for something, drill 6 string holes just after the last fret and post it off to them as an improved full scale version - it would take me five minutes, anyone want one. I can even make a little curved section to attach to the end of the neck to rest it on you knee.
Custom made full fretboard shred necks for £150 - i reckon thats a fair price if you pay £40 for just 7 frets