I have to say this is wayyyy cool after googling sites on what to do with felted sweaters other than making the usual (i.e., bags, blankets, leg/arm warmers, hotpads, and wine bags, etc).
To see what I mean, you can scroll down to the bottom of this page to see a pict of an upholstered chair done in felted wool. http://www.festivefibers.com/page/ffmakefelt.htm
and other items here: http://www.festivefibers.com/page/fffurnishings.htm
Anyone have the stomach to attempt this DIY using thrifted sweaters or roving and piecing the thing together? Would be exhausting but man alive, you could have some funky furniture!
I also think it could be somewhat scratchy depending on the wool used...