(Mobile) Browser support for Cross-Origin Resource Sharing?

I'm building a site that uses w3c CORS to make oAuth-signed HTTP requests to a remote server. Mozilla has a great document explaining how to make and receive CORS requests, and there's good support in firefox, chrome, and safari.

Does anyone 开发者_高级运维maintain a matrix of browser support for CORS features (e.g. preflight OPTIONS requests for cross-domain non-simple GETs)?

I'm particularly interested in mobile browsers. Can anyone point me to a resource that tracks CORS support?

Better late than never: http://caniuse.com/cors