I have a good friend who is also a home-brewer, and we've been swapping ideas about techniques and styles and things. Given that we're new to the scene and fathers of young kids, time is at a premium and we don't have much of a local community with which to share our results. We haven't yet brewed together but were discussing options for splitting batches into 2.5 gallons in order to pitch different yeast strains or dry hops in each so as to experiment with flavors.
I'm a seasonal nerd, so I've set my own recipes up in that pattern, but I know that other brewers don't have such ties and will simply brew whatever, whenever. So I'm not brewing a stout or porter in the Spring or Summer. But if someone else wanted to, and they brewed one of mine, that could really help me dial in the recipe at a time when I'm not brewing. I've also got limited time and space, so the sharing would be sort of like cloud brewing.