Pumpkin is a community around the Pumpkin Minecraft server software, with Bukkit-style dev talk.
Pumpkin centres on the server software of the same name, drawing developers and admins building on it. Members discuss Bukkit-style plugins, troubleshoot setups, and trade implementation ideas. Contributors gather feedback and bug reports here. It's a technical crowd focused on the software itself rather than playing, aimed at people running and extending Minecraft servers.