Ah almost forgot to mention, my second t61 had a larger 9cell batter with 1.8ghz core2 duo and 2mb cache, the battery was just as horrible as my 2ghz with 4mb cache.
This T500 lasts MUCH longer on battery life
gettin 3+ hrs with larger 15.4" screen (lower pixel rate though 15.4"@1280x800 on T500 and 14.1"@1440x900 on T61). I was quite thrilled about that folks ...