Bikamper bicycle tent?

[badgercat]

I looked around but didn't find any previous mention of this in the forums--has anyone heard of the Topeak Bikamper before? My boyfriend, who has been researching getting into bicycle camping/touring just stumbled upon it on the REI website:
http://www.rei.com/product/732405

A few things strike me as impractical: it lives on your handlebars, where I would imagine you'd want a much more immediately practical handlebar bag (I guess you wouldn't HAVE to keep the tent there while you were riding, but it would still force you to swap it out with your regular handlebar bag), and you can't have a pitched tent and a functional bicycle at the same time. Also, you think if they figured out all that crazy geometry, they could have included a way to keep your chain dry. Regardless, it's still kind of a neat idea... *shrug*

ETA: I'm just now noticing that all the provided pictures have mtb's. I wonder how/if it would work with drop bars. Interesting.