Mozilla Labs Releases Weave Sync 1.0
blog.mozilla.com
blog.mozilla.com
1) If I lose my phone that is a lot of personal data/security info that is available on my phone. Saved passwords would be useful, but I don't save any passwords on my phone now, and this isn't going to change that.
2) Last thing I want, if I'm returning through US border is all of this data on my phone, given http://www.theregister.co.uk/2010/01/16/laptop_border_search... (There are better articles, but that is the first Google result)
Bookmark syncing is also nice because NoScript can store it's rules in a bookmark, so I will only have to whitelist any site once.
Weave (and Xmarks) use these:
https://developer.mozilla.org/en/Using_the_Places_history_se...
Weave synchronizes bookmarks & passwords like Xmarks, in addition to browsing history and open tabs.