A few suggestions:
1) Include a link on how to install R or get R. I say this because I
think that ggplot2 has grown large enough people may find it before
they find R---that is they may see a cool graphic, see that it was
made in ggplot2 and then want to learn more.
2) I think it would be great to have a list of resources for learning
ggplot2 up on the main website. Off the top of my head, Dennis'
transition guide and the theme guide either as webpages or PDFs would
be good. What I would really love is something like Hadley's ggplot2
book, but available all online (and updated for the most recent
version of ggplot2). Perhaps this could be something on github that
the community could help with the maintenance of and then is just
periodically checked and built for the website.
I work at a university statistical consulting center that has
traditionally focused primarily on supporting Stata, SAS, and SPSS. I
have been putting a lot of work into expanding the resources we have
available for R in person and on our (freely available) website and I
make heavy use of ggplot2 for data exploration and presentation of
model results (e.g.,
http://www.ats.ucla.edu/stat/R/dae/ztnb.htm).
However, I do not really have good resources to _introduce_ ggplot2.
If I could say, "There are a couple great guides and introductions to
ggplot2 as well as all the documentation on its website,
ggplot2.org"
that would be fantastic. I think a lot of the clients I see are
impressed with the graphs, but feel overwhelmed to do it themselves.
Final products are great for display, but poor for teaching.
I have to say overall I am so impressed with Hadley and this
community. In addition to his own amazing work, Hadley has managed to
engage and catalyze others to make ggplot2, the website, the
documentation, and the community an exemplar for any software project.
The graphics and features are par none.
Cheers,
Josh
Joshua Wiley
Ph.D. Student, Health Psychology
Programmer Analyst II, Statistical Consulting Group
University of California, Los Angeles
https://joshuawiley.com/