Yes, there are implementations of PT 2.0 and 2.1 specifications. One of the criteria that we have adopted in the 2.1 specification process is that proposals need to have an implementation available before they can be considered for inclusion in a release of the specification.
Tor uses the part of the specification known as the Dispatcher IPC Interface to control a Pluggable Transport provider (known as a dispatcher) running in a separate process. The 2.0 and 2.1 versions of this protocol are compatible.
This dispatcher implementation currently provides the obfs2, obfs4, and Shadowsocks transports.
Operator Foundation does not currently have any plans to commit additional resources to the Tor patch, but it is there as a starting point if anyone is interested in pursuing the project of updating Tor to conform to the PT 2.0 (and 2.1) protocol. We will be continuing to update the dispatcher implementation to match the specification as it evolves, as well as adding new transports as they are developed.