This is great stuff, thanks for doing this! I've bookmarked this for future use.
One suggestion for the future, if you have time and think this is worthwhile: I've often found myself wondering how to do a very specific thing in ggplot2, for example, wanting to display numeric values with commas on the x- or y-axis. Usually I do an internet search and end up paging through search results from Stack Overflow, etc., trying to find questions and answers that address what I want to do.
It might be nice to have a document accompanying the plots that is basically an index of techniques used in the plots. For example, "displaying commas in axis values" -> [link to plot #2]. Otherwise a user would have to click through the plots one by one trying to find one that illustrates the technique. (For example, the plot of LeBron James's minutes shows how to use commas, but that's not really apparent looking at the thumbnail on the main page.)
But in any case, thanks again for the work you did on this!
Frank