Hey Rob,
Short answer is no.
There are two sides to the story. On the request side, HttpMachine would/will implement the decoding of chunked request messages, and the request data passed to the parser delegate will represent the decoded data (without headers/trailers). I haven't tested chunked requests at all; based you your bug report it sounds like it crashes the parser.
On the response side, Kayak would/will deal with encoding the response data generated by the user code if it detected a Transfer-Encoding: chunked response header. Currently it doesn't do this, so to build a chunked response, you'd have to output the chunk headers/trailers yourself.