Weighing in a bit late here, with a few random thoughts
* my collection of T42s started one day when I had bad case of the flu, high fever, and was in bed watching a movie on only true fair-weather friend, a used R40 I had picked up which, to that point, had never let me down. In the middle of the film, it gave me an error saying that the wireless card was not a proper card for the machine and shut me down. As soon as I was up and running a few days later (me, not the R40) I picked up a used T42 to replace the R40 -- and sort of fell in love with the thing. (Yeah, mental disorder, maybe, sure, I guess).
* so, trying to convince myself that I needed lots of backups in case the T42 met "catastrophic failure" like the R40, I started picking up used units and parts. I currently (this is perhaps embarrassing) have 11 T42s, of which 8 are souped up the max (max ram, max IDE drives, dual boot to XP and 7) and three are "donor" machines only.
* so my wife would not think me completely mad (emphasis on word "completely") I set up working computer stations in every room of the house. We do not own a single smartphone but we are never more than 60 seconds away from a fully loaded, ready to do battle T42.
* I do have other "more modern" machines in working condition -- usually gifts from friends trying to cure me of my T42 addiction -- but I always gravitate back to the T42s. I do all my work on the T42s and am writing this on a T42 that was donated with bad keyboard. Took me 2 minutes to replace the keyboard. (Thinkpad! Duh!)
* Parting thoughts: T42 still seems the perfect amalgam of fit and function. Think "smartphone with a full keyboard that you could edit video on" and you will get the picture ---- For any other T42 junkies out there, MPC will run most of the tricky videos but the latest iterations of MKV are proving to be a nuisance -- and, oh yeah, there REALLY IS a design flaw with the chassis -- if you pick up the machine by right-front corner you really can crack a motherboard in about 10 seconds or less. So don't say I didn't warn you.
Did I tell you that you can pour coffee over it while running and it will soldier on?
One of the last great IBM laptop innovations -- check it out on Youtube -- actually built drainholes in the chassis -- who does that anymore?
