Troubles with WX backend

1) I can't make 2 plots using WX-backend sequentially

Do you need to use matplotlib interactively from the prompt, or do you
simply need to make 2 figures?

The latter is easy

    import matplotlib
    matplotlib.use('WX')
    from matplotlib.matlab import *
    figure(1)
    plot([1,2,3,4])
    figure(2)
    plot([1,4,9,16])
    show()

For interactive mode, as suggested earlier, we're still ironing out
the bugs regarding interactivity and WX.

Thanks!
John Hunter