Well, I know this is a zombie thread, but I am resurrecting it because I am experiencing this same problem with my new G30. And I also had to respond to the above, because switching to 11b has got to be the *worst* possible advice. 802.11b is the oldest and SLOWEST of those three standards (b, g, and n). Equally absurd is to "upgrade to a 5GHz router". I have a 5GHz-capable router, and I use it. But there are still gobs of new wireless devices that are 2.4GHz only, let alone everyone's existing stuff! So folks that can go 5GHz-only are few.
I have downloaded the WiFi chart above, and will use that to try and find a compatible "channel". I live in an older house, and rely heavily on WiFi to get internet connectivity to major parts of the house. And like everyone else, we like us some NetFlix, so it needs to be relatively fast. Assuming folks will just change/degrade their home internet to accommodate Line 6 is soooo backwards. If there is an unresolvable conflict between Line 6 and my home internet, it will not be the home internet that goes anywhere...
