And in answer to your question - It's a recruiting platform like The Resumator, or Jobvite, but with a job board built in. It also adds social data to job listings and to job applications - so each job listing will also show a list of people who recommend working there. If you're an employer, when people apply for you job, it shows you a list of your team members who choose to follow the applicant on Twitter.
Companies could find it useful because recruiting is extremely hard - there's a low signal to noise ratio, so you might get lots of job applications from people who aren't really suitable, and only a few applications from people who are great. Moki helps you spot the people who are most likely to fit in quicker. Job seekers can find it useful because jobs listed aren't from recruitment agencies - they're from the actual company themselves - you can see a profile page of the company that explains their culture, office & perks and you can see a list of people who recommend working there.
It works, hopefully, seamlessly - companies list jobs in the same way they would with a regular job board and people apply for jobs directly on Moki, filling in a form on the site. The only difference is that you need to log in through Twitter to sign up. Nothing is ever automatically tweeted from their account.
As you can see - I've not quite found a way to word the concept elegantly yet. Thanks again for the feedback - I genuinely appreciate it.