Yes, this is a test to do, another test is to use 3G without internet connection active.

I take a look to top and i see that these process are responsible for the activity showed in my image:
1) hildon-desktop: 0.5 - 1.5, all the time
2) hildon-status-menu: 0.5 - 1.5, all the time
3) skyhost: 0.5 - 2 all the time
4) dbus-daemon --system --noforce: 0.5 - 1 all the time
5) gconfd : 0.5 - 1.8, less frequent but frequent.

I don't inserted in this list XOrg.

Shutting down the 3G Internet Connection with the chat, the process 3,5 disappear, the 4 reduced is activity.

Maybe this bug could be related?
https://bugs.maemo.org/show_bug.cgi?id=10412