Are there any non-trivial CodeIgniter apps out there?

[eluser]shoppe[/eluser]
Hi:

Before I get too deep into CodeIgniter for an enterprise-level app I'm designing, I'm wondering if there are any CI apps out there in the wild that are more than simple blogs with auth/login capabilities. For example, are there any notable ecommerce sites running with CodeIgniter? I'm not looking for a Facebook, but maybe something like Groupon?