From dmesg on my new(ish) Lenovo T61 running Ubuntu Hardy Heron:

iwl4965: Intel(R) Wireless WiFi Link 4965AGN driver for Linux, 1.2.26k
iwl4965: Copyright(c) 2003-2008 Intel Corporation
iwl4965: Detected Intel Wireless WiFi Link 4965AGN
iwl4965: Tunable channels: 11 802.11bg, 13 802.11a channels

I finally got the OSS driver for my wifi card to work - thanks to the Linux Wireless project. Version 1.2.0 of iwl4965, included with Hardy Heron, didn't work for me - neither did its predecessor that shipped with Gutsy. But version 1.2.6k is working fine. Joy! - no more ndiswrapper for me. <grin />