[rounz]

that sony mobile phone someone has tried to connect usb-to-ethernet listed multiple times in the log is my guess as to the cause,

as for the solution, the route tables are a mess, correct those first off and then if that dosent get you anywhere try a livecd (something like slitaz cooking is ideal, small and fast) and see what that connects like, wildly guessing software faults isnt best way diagnose the problem as the route tables control all apps, id say the sony phones been plugged in and out a few times as lan connection had a number of 22 :P

good luck