Should we update what we have so far?
I'll try to make a summary:
Asus UL30A-X5/UL30VT (13.3")Pro:
Cheaper $600/700
Light 3.74 lbs
12 hours battery life
Cons:
No Disk Drive
Processor slightly slower than competitors
Lenovo x201 (12.1"):Pros:
Nearly unbreakable - Lenovo
Solid specs - i5 Core
3.1 lbs
Cons:
No disk drive
Slightly more expensive even with deals (800-1000)
smaller screen
Lenovo T401s (14")Pros:
Nearly unbreakable - Lenovo
Solid specs - i5 Core
3.9 lbs
Disk Drive
full 14" screen
Cons:
Expensive 1100+
Sony Y seriesPros:
Sony Style
Light without extended battery
Cons:
Short battery life
Cost 800/900
MacBook/MacBook Pro (13.3")Pros:
Mac
Disk Drive
Cons:
Mac
Expensive 900-1100 (cheaper if you sell the free ipod)
Heavier (4.5-4.7 lbs)
This is by no means the complete list of what is available.