So, it's different in that it doesn't really provide company-specific networks, it makes traditional public IM networks web-accessible.
It also, like IM patterns in general, is one-on-one chat first, group maybe, in the kinds of workflow it promotes. If you've used IRC much, this is team- or group- oriented first, private maybe.
We tend to think this fits the real needs of workplaces better, because the group/team approach is more like a meeting (widely communicative, don't-repeat-ourselves, no secrets, etc) vs. hallway conversations (not well disseminated to all those who could benefit from it, inefficient from a repeating answers perspective, etc).
Thanks for the input on the frontpage. We're considering a redesign.
I mention monetization in the initial post. We're planning on charging per-user per-month fees to companies. Good point about being forthright about this; we should really give this thought, b/c we don't want customers feeling like we've pulled a bait-and-switch on them.
I think the target audience is one of the big differences. 37S, as usual, is targeting small teams with simple needs, and doing so with a diverse set of complimentary products, including campfire. They're doing 80/20, and doing it very well.
We're focusing on chat specifically, and we'd like to add a lot more depth--background room notifications, sophisticated group/room access rules, LDAP/AD integration, marketing ourselves to medium-sized organizations (several hundred users/company) that have higher standards when it comes to integration with existing systems, management ease, etc. We're shooting for a more complete solution.
So, I think Campfire is one comparison where recognize we're competing along a difference of degree, not really a difference of kind.
Frontpage design is clean but it doesn't feel smooth enough. It seems rather flat I guess.
What are your plans for monetization? Sell memberships? You have no mention of this on the site now, if that is your plan you should probably make that clear before a company gets set up with it thinking it will be free.