Given my laziness, I tried to write a bash script that opens at once some daily apps in different desktops. This script should work in Gnome. I've written that so far:
#!/bin/bash
firefox &
thunderbird &
/usr/bin/netbeans --locale en &
amsn &
gnome-terminal &
sleep 2
wmctrl -r firefox -t 0 && wmctrl -r netbeans -t 1 && wmctrl -r gnome-terminal -t 2 && wmctrl -r amsn -t 6 && wmctrl -r thunderbird -t 7
... but it doesn't work. My apps open, but they won't be assigned to the desktops I specify :(.
I changed the value of sleep to 15., but only firefox & netbeans are assigned correctly; the rest opens in the workspace where I execute the script from.
Thanks to Akira comment, I finally succeeded at making it work (the script runs at startup like a charm) Here is the new code:
#!/bin/bash
wmctrl -n 8
firefox &
thunderbird &
/usr/bin/netbeans --locale en &
amsn &
gnome-terminal &
sleep 15
wmctrl -r firefox -t 0
wmctrl -r netbeans -t 1
wmctrl -r terminal -t 2
wmctrl -r amsn -t 6
wmctrl -r thunderbird -t 7
#focus on terminal
wmctrl -a terminal