Possible to write Protovis code in CoffeeScript?

Question

I would like to create visualizations using Protovis, but writing in CoffeeScript rather than JavaScript (partly for the (x)->x function notation but other reasons as well)

Is this possible? What <script> tag would I use and is there any special order of script tags that are necessary?

Thanks.

Edit: I'd like to avoid a manual compilation step if possible.