I have owned a Linux Certified LC2100 for almost 9 months. Early on I had upgraded the version of Ubuntu that it shipped with and from that point on, until now, the 801.11 interface would not work correctly.
Today I downloaded and installed Ubuntu 6.11. The upgrades in this version of Ubuntu have apparently added support for the wireless network card this laptop uses. I had absolutely no problems configuring the wireless interface with my home 802.11g network.
Great job Ubuntu!