In my last post about netbooks I said I'll make it so some kind of series of guides, so here the second part

One of the biggest problems when using a nebook is that every pixel matters. the screen is so small that you really need save as much screen as you can.

For that reason i found it very comfortable to replace the panels with a dock such as Avant Window Navigator (and not like Docky that I don't like at all!).
when I looked on web (or more exact, on Google) I wasn't able to find anything useful about it, so i went to our chat (#ubuntu-il) and got the answer right away (thanks Avishay! you're the man!) :

WARNING: make sure you have a menu somewhere else, since after that step you can't use Alt+F1 or Alt+F2.

First open the terminal (for beginners: Applications > Accessories > Terminal),
now enter the command:

gconf-editor /desktop/gnome/session

double click the option "required_components_list" and remove from the list the "panel" value.

logout and login back,
that's it!

Dor