You have two options I know of to de-orange the San Francisco. You can use something like Titanium Backup (requires root) to remove the Orange apps or install a custom ROM.  

On my San Francisco I rooted the phone (see first part of this [video][1] or you could use [Super One Click][2]) and then used [Titanium Backup][3] to uninstall the Orange apps (list in [this thread][4]). If in doubt, TB lets you 'freeze' apps so you can make sure everything still works before uninstalling fully.  

Alternatively, you can install a custom ROM (see [full video][5]) which I haven't done yet (waiting to see if FroYo ROM becomes available). 


  [1]: http://www.youtube.com/watch?v=E28U0t5RZz8
  [2]: http://forum.xda-developers.com/showthread.php?t=803682
  [3]: http://www.appbrain.com/app/titanium-backup-%E2%98%85-root/com.keramidas.TitaniumBackup
  [4]: http://android.modaco.com/content/zte-blade-blade-modaco-com/321479/remove-orange-apps-on-san-francisco/
  [5]: http://www.youtube.com/watch?v=E28U0t5RZz8