Cool cat furniture

For all of you cat lovers out there, and I know there are a few of y'all, here are some cool links to cat furniture, towers, gyms, etc. that I thought y'all might like looking at. The first one, I think, is pretty reasonable, and the other ones, esp. the second and third ones are super unique, and could give us some great ideas. This might be a way for someone to be able to afford one, without breaking the bank, and esp. if you do not have someone who could build one, or more, for your pet(s). Hope y'all enjoy the links:
http://www.catfurniturediscounters.com/
http://www.catsplay.com
http://www.cattreeplans.com
http://www.catnip.com.au/photos.htm

The last one is a cool idea, and I would love to do it for my kitty, that way I could have her outside with me, and be protected while she's out. Very cool concept!