Does anyone know where I can find the bookmarks for "Opera Mini" and "Opera Mobile" and back them up to my Mini SD card on my HTC Touch [T-Mobile UK] as I may need to send it in for repair...

For the desktop version of Opera, the bookmarks are stored in an opera6.adr file. I found the opera6.adr on my pocket pc in the \Application Data\Opera folder.

See this link for more information: How do I back up my Opera files?