Networking's a good idea.
To "hear" other probes would require better receivers on the probes than I had in mind (most space probe concepts are based on relatively small transceivers on the probe, and some damn big ears and signal squirters on the Earth).
But I don't see any showstoppers. A simple unfolding dish such as is common on many satellites would probably do the job. If the probe is nuclear powered, you can get a bit friskier on transmission power, too.