GIS Features and JSON

I'm a big believer in GML, but not such a fan of XSLT. For many web applications, I want to bypass the transformation and directly get GIS features (whether by WFS or other service) as javascript objects. In PrimaGIS we are using JSON-RPC, and a data structure that is modeled after the GML simple features profile:

// feature collection
  // a feature
    'id': 'aa1',
    'properties': {
      'name':     'Foo',
      'category': 1,

I'm curious if there are other programmers interested in a JSON simple features profile. The representation of non-geometry properties is obvious, but what about geometries? Is it better to aim at existing Javascript drawing APIs like WZ, or look to Canvas?