I read that link, which is apparently by the creator of Review19, on how similar it is to Trello. One thing from that list really surprised me: "Review19′s target audience — web, creative and software teams — are often distributed around the world. Offering an in-browser, video conferencing option is a critical feature for Review19."

Why does Review19 have to provide the in-browser video conferencing? Why can't people just use Skype or GMail's video chat? It seems like an enormously difficult-to-develop, bandwidth-intensive feature that people can already get elsewhere for free. I'm genuinely curious what critical benefit this integration provides for the users of Review19.