Here’s what I’ve been working on the past couple of months — Chatbox, a site that lets you form instant chat rooms with any group. You can even take an email thread and turn it into a chat room by cc’ing email@example.com. Participants get sent a link and are instantly in a persistent chat room. You can share files (just drag & drop anything into the chat).
It’s perfect for any sort of team project — you can drastically cut down on your emails by keeping a chatbox going. It’s also great for quickly getting a group together to decide something. Planning with your group where and when to meet for drinks after work? Instead of sending 400 emails back and forth, just launch a chatbox to hash it out in real time.