30-second overview leaves me with 1 question: Why would I use this? Sure, you tell me that it's awesome and geeky under the hood, but what exactly is the value proposition to make me want to use it?

I think it would make sense if tesla.im had a single, very clear selling point that elevates it above other chat things. For instance, can you make me feel very VERY confident in the confidentiality/privacy aspects of your product? Since Google just dropped XMPP, you could pick that up as a value proposition as well.

"Realtime" isn't valuable to me if everything already feels realtime - it just sounds like a buzzword (even though it's not). This may be valuable to people who don't know anything about IRC or Google Chat already, but it feels a lot more like reinventing the wheel that already works pretty well with different technology.

Some general comments: The design is decently executed, but there are some points that could use some work. Specifically, there's a lack of imagery that leaves it feeling a bit cold. The copy sounds a little unpolished in places.

If you'd like a further/more in-depth review, you can reach me at jonathan[at]whiteboard.is