These are some great ideas!
Of course, the chenille I inherited is is huge spools (a foot tall, 8-10 inches wide or more each!) and very fine weight (thinner than fingering weight sometimes). Lots of these ideas sound like they'd work better with thicker yarn.
So another question:
Is there a good way to work with more than one ply of yarn, or wrap yarn balls or hanks in double or triple ply, or otherwise find some handy way to multiply the threads to thicken them?
And for all those pattern ideas, I want to go out and get more normal weight chenille and knit them! Which is the last thing I need because I have a whole corner of my room devoted to chenille spools now