Still, considering the power of visualisations is their ability to tap into our "GPU" the most suitable preview mode would be a thumbnail even if it is targeted towards developers. On that note – no demo links - no sale.
I'm struggling to understand what you're referencing. The database contains both links to the visualization and thumbnail URLs. Chris posted an example of a gallery with thumbnail previews, which you can click on to see the original.
The Google Doc is where the data is curated, and available for developers to make their own visualizations of the data.
Can someone point me to a high quality d3 tutorial? Either video or text, but an actual progression from basic concepts to a full working project, with code?
I have read a decent amount of their documentation wiki, and have modified some of the examples, and made a few very simple things from scratch, but I am still missing some huge concepts.
This is great. I would like to see more all-in-one-document documentations and demos. In most cases this just feels faster to me. This is maybe not true for something like the complete Java API, but for many smaller docs.
If you want to see what Mike has been up to most recently you can also check out http://bl.ocks.org/mbostock. This displays all of his most recent gists/experiments - many of which never make it to the gallery page.
I temporarily disabled public write-access as the spreadsheet is choking under too many requests. But you can definitely view. I will restore full access in a day or two. Just send me a write-access request in the meantime or add your examples to the official wiki. Thanks!