yep sounds like the cable to me, your lever will have some play which you mentioned you did up until the tob hits the pressure plate. so your lever is not broken, i know this for a fact cuz i broke the tob fork prongs one time and i could move the lever alot all the way back and all the way pulled foward, it would occasionally hit the tob but yeah i pulled the tranny off and sure enough both prongs were broken.
replaced it and went on my way, i though it was my cable at first as well. Your lever should feel nice and smooth foward and back and you should really be able to lift up on it at all if the tob is still attached, if you pull up on it slightly and it starts to come up a ways then its probably the fork.
Again double check your cable, give it a nice tug, it might have snapped a couple threads and streched to the point where you lost complete use of it. Ive seen that happen as well. To where its not totally snapped yet but it will if it had any more tension on it.