Weird and weird.
The wlan setup is the exact same i used at FOSDEM, and it worked.
As the same doesn't work on your laptop, i'd say another parameter is needed for your access point.
Maybe set the channel (should be automatic anyway)?
iwconfig wlan channel your_channel.
For the usb share, i have no clue.
At least, you can use nfs.
I will dig those problems soon.