How do I create a catalogue list that links through to my individual product nodes?
Now, I'm not using D7 yet, but Views has settings to turn fields within a node (your product nodes) into links to the originating node. Just go to your View that is your grid of products, check out the individual Fields you use, in their settings some of them (if not all of them) should have an option to turn the field into a link back to the original node.