Here's a cool collaboration app from the folks who brough us WriteBoard. It's called Campfire and it seems like a great way to collaborate via Chat and some shared files. Here's a few of the services as described at the CampFire site:

Campfire makes group chat easy

Every chat has a permanent URL
Campfire chats don't require special chat software or networks
Instantly share and discuss files with your colleagues/clients
Search or browse through transcripts of past chats
Chat securely over SSL (Plus and Premium plans)

Campfire is perfect for...

Keeping a room open to discuss anything at any time in real time
Discussing a project in real time with your clients
Sharing files amongst multiple people at once
Anyone collaborating on anything across the globe

There was a waiting list for new subscribers earlier today, but I just signed up without any problem, so if you're interested, try your luck by clicking here. Once I've had a chance to test it out, I'll report back on what I've discovered. Feel free to let me know your thoughts on it as well.