It doesn't have a shopping cart--at least not that I'm aware of. Most of the reservation page is custom forms / code and such. We have been expanding and tweaking the reservation form for over 6 years and it is available in English, Spanish, and Portuguese.
Also, Ryan gets a ton of email so he doesn't always respond. To get his attention I usually have to send him text messages.
Not sure about padlooper...I've never heard that word.
I'm happy to answer other questions.
Jan
CTO
Tripsite.com