Ask HN: Looking for feedback on our startup

I am looking for any kind of feedback on my startup, Callr[1]. We have a consulting company and built Callr out of frustration with conference calls and we have been using it for a year. We opened it to the world two months ago and have been getting some traction, but not enough.

Our main problem at the moment is the high bounce rate. The visitors to the site are not converting to signing up for a free service. Would you mind taking a look at the site and let me know if we are explaining the service adequately? Any suggestions on how to improve it?

Thanks for your time.

[1] http://getcallr.com/