OK, that little 3 in the status area is wifi-signal-applet, which has just landed in extras-devel. It's not pretty and I lack an artistic streak so I had to use text. Designers, please do your thing. Oh and it checks the strength every two seconds. (FWIW, the standard wifi applet checks every 1 second when the status menu is open) It does not check when either the applet is not in view (fullscreen apps, display off, etc.) or if you aren't connected to a network. I will add a CPA for changing the timeout. Also, I do not know if it works when connected to the Internet through your mobile network. Furthermore, I couldn't get it to go to 10, even when I was right next to my router. Blame ICD2, not me!