here's my usb list.. what to do now?
AFAIK, there is no separate network manager module for wifi, so I can exclude the case you are missing some piece of nm.
Next, I assume your wifi card is the Realtek one. If this is the case, it's good because, at least, it's been detected.
If this is the case, try to install ubuntu-drivers-common, which is a gui to help you install proprietary drivers (if I remember correctly it's not installed by default).
sudo apt-get install ubuntu-drivers-common
After having installed this basically if you go into the installed applications in the app store you'll see that it will suggest you to install some proprietary drivers
Another check you can do is if this wifi card is enabled; you can perform this check through rfkill
and if the wireless card is blocked/turned off just type
rfkill unblock all
Of course, if the realtek device that appears in your lsusb is not the wireless card, this could means that it was not been even detected
I have a new Asus ZenBook (just shipped) with an Intel 9000 series wireless adapter built in, and I had the same problem. I solved it by manually installing the backport of iwlwifi using the advice of "jeremy31" here:
Note that the first recommended install didn't solve my problem; it was the second step (getting the newer version from Canonical) that actually solved my problem.