Best laptop for realtime blogging?

Dave Winer asks what is the best laptop for blogging at conferences. Personally, I love my IBM Thinkpad X20. It’s small (<4 pounds, just over 1 inch thick), has 3+ hours battery life, and (this is the key point) IBM makes the best keyboards of any laptop vendor. Never under-estimate the importance of the keyboard if writing is what you use the machine for. The WiFi connection is a snap for me with a Cisco Aironet 350 card and WinXP Pro; current IBM models offer WiFi support built in.