Installing Ubuntu 8.04 (Hardy Heron) on a ThinkPad T61
Open Source Intel Wifi Driver
Intel has created a new Linux Wifi driver project for Intel Wireless cards, "Iwlwifi". This driver is Open Source and no longer requires the Intel daemon to run in addition. This project will support the T61's Wifi Intel 3945ABG network adapter and Intel 4965AGN network adapter.
It is not verified that an automatic migration will occur when upgrading from Ubuntu 7.10 to Ubuntu 8.04 will occur. If it does not and a migration is desired, Ubuntu Help Community has written some documentation that will make this very easy to do.