The same questions as some years back: How to get started with it ?
The good news: There is plenty of material out there about D3, books, websites, tutorials. I purchased a couple of books from Packt Books and O’Reilly as PDF version, I think they have the most books, though most of them based on earlier D3 versions.
I wont recommend a specific one, most follow the same principles, a short intro to the DOM, explain the D3 basics followed by more or less complex samples. As with any other technology or programming language you learn most hands-on, there so many examples and good tutorials available. I never attempted to understand everything, understand the concepts, dissect existing visualizations and get creative !
Crowdfunding becomes more and more popular with many successful projects coming out of the various platforms in the web (most Kickstarter and IndieGoGo). I like the idea of independent smart people coming up with an idea and let a product or concept take off without backing by a huge MNC (though these companies might buy a crowfunded project and turn off supporters, but that is another story). I believe crowdfunding can be a source of genuine products which are not made solely to hog patents and increase shareholder values.
Doing panoramic and spherical photography for more than 15 years now, I am excited about the new ideas, technologies and products coming up.
Sometimes you should follow your ideas or visions, I did some basic research for an own panorama rig similar to the projects below back in 2007 (link), but did not really complete the project and with the requirement to export the images and stitch them in the PC it was not very practical. In 2007 I did not see the option to stitch with hardware on-board.
One already successful funded project is the Panono Camera Ball (a camera in the shape of a ball thrown into the air to snap an full spherical images with 36 small cameras built-in).
2 new projects that are still in the funding phase I back with 300 U$ each. Both try to create 360 degree images and videos
The CentrCam At the time of writing the project still have to fund another 360.000 U$ in 6 days, seems to become unlikely being successful.
Lets see who makes the race (they are not competing I guess) but is a bit strange that the 360Cam has a target of 150.000 $ only, with a much richer feature and quality list compared to the 900.000$ target of the CentrCam that would output video in a lower quality and smaller resolution. Anyway lets wait for the funding results, I am happy to support both (at least I add both to my panorama collection).