I mixed up versions, we launched with 4.9.1.
I agree we have a lot of SEO work to do on the site, and that is what we will be spending most of the next week doing.
The menu is from RAD and we use their text editor as a core provider. App Theory provided the News, Blog (articles), and text/Html, modules. Other than Catalook running our ecommerce, the site is all core. Of course, we had some custom development, but most of it centered on a custom profile, the sake selector, and an integrated rating and comment system.
Regarding the skin, it is 100% custom. We found an independent designer whom we thought shared our design goals, however he had no experience with DNN or our ecommerce engine. There were hurdles overcoming gaps between design and practical functionality, but App did a really good job. About 95% of the original design was incorporated into the skin.