My 20Gb Euro Launch 360 (that I bought from someone for 160 euros who won it shortly after launch) still works, but is used quite sparingly (Forza 3 and 4, a few XBLA games). I have had 3 PS3, of which my only fat died this year (so that's after four years extensive use for games, dvds, bluray, streaming, etc.). It was a 60GB part-BC and it got the ylod, not bluray drive issues (which seem to happen most often to 40GB models). I still have it lying around because it isn't deactivated yet.
Not quite relevant, but I also have two PSPs, one Japanese launch, and one white Daxter pack (2006?). The white one has fallen into the water while on, completely submerged, but has dried up just fine and now works again pretty much without issues. As a comparison, my iPhone 3GS is crapping out all of its connectors (headphone jack, charger hub), after just two years. In my office, about half the 3GS have developed issues with its switches (mute button fails most often), connectors or buttons.