I believe Karen Stone demo'd the freezer paper version on Simply Quilts several years ago. She sewed next to the fold and by touching a clover iron to the fabric placed on the "waxy" side of the paper--it sticks and remains stabilized until you pull it off. Then your foundations are reusable.
Getting it to lie flat so it will run through the printer is my main complaint with the method because I hate to trace and the method of only tracing one, stacking a bunch under that one and running an unthreaded sewing machine over the traced one is also more fuss & bother than I'm willing to deal with.
I really like the idea but putting it into practice takes too much prep work for me. If I could borrow someone's big plotter printer--load it with a roll of freezer paper--and print out all my foundations that way--I'd do all but the most simple patterns with that method because it makes your blocks so perfect.