I was mentioning to someone on dinner just the other day that there is a market for job-boards focused on H1-B jobs, and here we are with someone else already active with this idea.
Jobchowk.com is a job board for "students and H1-B visa holders" (emphasis mine). My guess is that they added this "holders" clause to avoid some further heat in an already controversial job board.
Companies in the U.S. cannot endorse job boards like this publically because of public-pressure to hire US citizens, but I think many departments would still want to hire H1-B holders. What’s likely to happen here is that "job placement" companies which act as proxies for those firms will advertise on jobchowk, and forward the candidates to appropriate positions – only the placement firm’s name appears publically.
For US companies that are open about hiring H1-B visa holders / seekers, this could become an interesting destination to look for jobs.
I’m not sure who the original creator of this job board is, or where he/she’s from.