Hello, I have successfully set up the yun on a wifi network, I can download sketches via wifi, but the serial monitor will not work.
I know it is connected because I can download blink over wifi and it works. I can download WifiStatus, and the LED13 stays off and there is no serial connection. After download is done, I open serial, and it opens the monitor at 300 baud, and tries 4 times to connect and then displays a message asking if the bridge is used in the sketch (it is). If I try to change the baud, it will not retry, and if I close the monitor and reopen it, it goes back to 300 baud. If I try changing it as it is trying to connect, it does not help.
I am out of ideas.
Thanks for any help I get!!
JM
I was confused by this too. In my case, if I first start the Arduino IDE and then plug in the YUN, then I consistently see the serial port.
Same problem for me Federico...
as said before my workaround si to change Serial commands to Console commands
but i think there are some issues in the IDE you should fix it
i managed to use serial just one time and I don't know how
In the meanwhile I'm happy of my progress...
I forget to say I'm on Mac using Maverick
raxpa, have you read the doc on the playground?
Yes... 
there is not so much to read... I've tried several times the only port which works is the wifi port the one with the ip address and using the console command