Do you feel 2D plotting is sufficiently developed to be useful at this point?
According to this SO question[2], there was some web-REPL plotting earlier but it is unmaintained now.
[1] https://github.com/nolta/Winston.jl
[2] http://stackoverflow.com/questions/14970817/plot-not-defined...
https://github.com/mbaz/Gaston.jl
Docs: https://bitbucket.org/mbaz/gaston/downloads/gastondoc-0.5.5....