Found this tools today. They automatically save your posts on several bookmarking sites. First is OnlyWire and second one Delicioso.

OnlyWire works with :

* Backflip
* Blue Dot
* Blinklist
* Delicious
* Furl
* Magnolia
* Rawsugar
* Shadows
* Simpy
* Spurl
* Wink

and Delicioso :

1. tagtooga.com
2. del.icio.us
3. furl.net
4. simpy.com
5. blogmarks.net
6. shadows.com
7. spurl.net
8. nevous.com

On Daily Blog Tips i found the first one, the post is here: Multiple Bookmarks with OnlyWire.

Delicioso software with video tutorial : Automate Social Bookmarking With Delicioso.

This is a preview of Multiple Bookmarks - easy way. Read the full post (111 words, estimated 27 secs reading time)