This is an excellent idea, especially for a skilled willow weaver.
If you need a bicycle wagon and can get a lightweight frame built, this seems to be a great, eye-catching option. I suggest watching the short videos on their site as well. I find their site somewhat difficult to navigate, but who am I to talk with all the clutter around here?
Here is a quick link to the video about the Weaving Wagon:
Click here for their full post about the Weaving Wagon and I suggest looking around. They have some neat stuff going on.
I think I would really love to have something like this.