I put Slackware (my favorite distro since '96) on my new Dell 5150 laptop, back before Christmas. I just used Partition Magic to shrink down my XP partition, then installed Slackware. The only problems I ran into were that (at the time) the driver for the Broadcom network card wasn't in the linux source yet and I had to find & compile it. I still don't know if there's a driver for the 802.11 card.
Overall though, everything runs well. The above guides n0cmonkey posted look good.
Now I've got an itch to try Gentoo... 🙂