Twitter and Facebook integration: the sidebars could be organized slightly better, but they’re a good start nonetheless — I particularly like that Flock auto-detects that you’re logging into the websites and just offers to remember your account information and add the toolbar. As simple as it gets.

The main problem with Flock, really, is that it uses the Firefox rendering engine, which I don’t like as much as WebKit. And the sidebars don’t really make optimal use of the screen real estate they occupy, which is pretty frustrating on the 13-inch MacBook.

I’m not sure I’m going to switch — I’m a geek, and I like more customization and functionality — but Flock actually looks to be the ideal browser for people who spend their days checking their online accounts.