I purchased a Lenovo G550 around 3 months back. Lucid works flawlessly! Another 'works out of the box' experience :).
Please make a entry here http://lug-iitd.org/List_of_laptop_with_preinstalled_GNU-Linux_in_India & http://lug-iitd.org/Articles/My_laptop_is_working_fine_with_linux
Too lazy to post on a wiki that needs me to sign up.
My Trusty Dell Latitude D820 works perfect since Ubuntu 8.04. I don't meddle with a lot of compiling or change a lot of system settings though. The only issue was multi-monitor setup. (Had no internet and needed to connect to a projector. No go)
And the Tata Indicom has its own mind on when to work, though this has nothing to do with Dell, and I know there's a script / fix for the Tata Photon around.