In Valve's 9 November status update, they mentioned that little SDK business, as well as providing information and some pictures.

Quote:
Here's a sneak peek at the plush Weighted Companion Cube coming soon to the Valve Store. Your rear-view mirror will want a pair of companions, too.

I'm disappointed they're not actually cubes, but Lorithad says he'll be buying one. I still prefer the more puzzling solution to this problem.

with a long needle, and some strong thread, you can make that 'cube' more cube-shaped.

just use the thread to pull facing sides together on all 3 axis. several places on each axis to make it less noticable... id say 4 places all around the circle surrounding the heart. Make a small stich (pink thread if possible) then push the needle and thread through to the other side of the cube, also on the circle, pull the desired amount of tension, and make another stitch. One should note that unless you use strong thread, the threads can break if you distort the cube, or if you dont do many threads per side, that they could rip the cube when distorted...

alternatively would be to unstitch a seam, unstuff the cube, and actually sew in "cells" to make the center rigid enough to hold more of a cube shape... this is more difficult but should prove more stable.

If I get one I'll mess around with it...

Yeah, i'm hoping to get one and hang it next to my zeke plushie.

Not really looking to get the cube-dice type thing. But if thats all the have, I'll just get it and just hang the one. Give the other to a friend.

looks like they'll have a set of rear-view mirror dice, and a larger plush, so you wont have to setting on the small ones

I wan't a life size plushie WCC!

They really arent cubes, in fact i think they are closer to the weighted sphere as seen in the advanced chamber 17