Google chrome has just added bookmark synchronization.

However:

• I cannot make it work under linux, with build 4.0.249.11
  
  

  Google chrome bookmark sync disabled

  
  
• why the hell do they store the bookmarks in Google docs, rather than in Google bookmarks? Google bookmarks is used by other services :
  • adding a place in your favorites in Google maps, for instance ;
  • or extends search results in Google search
  

  Google search extended with bookmarks