Hello,
this is my first posting and I would like to say thank you for the TOP product!!!
Yes, 100% K2 is widely used in Joomla and the K2 support in the plugin is a must for the Joomla community.
But, talking about ecommerce + Joomla, then we have to talk about the Virtuemart component.
I'll open a diferent topic in the forum about the Virtuemart support.