I have made canvascape compatible with Internet Explorer:
http://www.abrahamjoffe.com.au/ben/canvascape/

I used a vml canvas workaround produced by Google (similar to the one
by that Emil fella), it hasn't been officially released yet (it should
be in the next couple of days) but I was sent a test preview about a
month ago and have only been recently given the go ahead to publish an
application of it. Feel free to copy and use the external file.