So what exactly does Chrome data syncing mean? It basically means anything you do in one browser will show up immediately in all your other Chrome browsers, no actual syncing required, like with Xmarks. Add a bookmark. Delete one, it's shows up instantly. You'll also be able to get to your bookmarks in any browser through a web app by logging into your Google account. Ars says that the sync framework's designed to scale to handle other types of data.

[Google via Ars]