I received a new laptop, a Dell Latitude E4300. I installed lenny on it, as I usually run testing+APT pinning. What Im describing here is what is unsupported in lenny out of the box.
Needs a 2.6.27 kernel (iwlagn driver), Lenny only has 2.6.26. Downloaded from the kernel teams unofficial repo. Firmware isnt packaged in Debian (firmware-iwlwifi needs an update). Needed to download it from Intel.