once in a while, people as about supporting REST in ROSDK. the problem is — what is REST? REST really is just a fancy name for HTTP. You call a URL, and you get some arbitrary data back, could be any format (XML, JSON), and any structure.
REST doesn't really fit into ROSDK, which abstracts methods calls at a much higher logical level, and i really wouldn't know what we'd implement in terms of REST support that isn't, really, just a plain HTTP client component — of which there are hundreds out there.
Maybe i'm missing something — and if so, i'd love to see a concrete example of how you see REST fitting in with what RO does ("define methods, implement them on the server, call them from the client, without worrying about the inbetween, too much")