Seems like sychronization is the newest killer app out there. First, Mozilla Weave comes up with the ability to synchronize Firefox settings between computers. Second, the Foxmarks Synchronizer add-on is updated to do just that for your bookmarks. Third, uber citation manager Zotero can now be synchronized between computers with Zotero 1.5 Sync Preview. It’s one of the key features (beta, mind you) that had been lacking in this cool Firefox add-on. More at the Zotero blog.