No, this is a different module.
You'll find SilverCart here: [url]http://www.silvercart.org/[/url] (downloads/documentation/forums etc.)
Two separate Modules...
SilverCart: [url=http://www.silvercart.org/forum/announcements/show/19#post19]Forum Announcement[/url] and [url=http://code.silvercart.org/]Their hosted code and issue tracking[/url]
SilverStripe E-commerce: Everything you want is on the google site: [url=http://code.google.com/p/silverstripe-ecommerce/]silverstripe-ecommerce[/url]
Both are very promising and solid Modules. So far SilverCart hasn't implemented their US localization, but they are working on it.