They can include the link to the chat page in job posting, articles, careers page, email etc, like "Apply via Chat"
A few benefits are: - low barrier to get in touch, right when the candidates are the most interested - faster than email and more comfortable than phone calls(especially for tech guys) - no more filling of long application forms - gives a good impression and stands out from the competition
Push the mobile side of things, right now every recruitment site has a brick wall where the CV upload is mandatory but every iPhone user cannot upload a file - you're solving that problem and then some.
My product is similar to HootSuite, Buffr etc. but by focusing on a Niche (Real Estate) I'm seeing promising traction. By focusing you're going to find it easier to reach potential customers and your product development will be cut down too.
Are you in the UK? I'd love to meet for a beer and discuss, I think this could be huge.