With Mac OS X 10.1 expected to ship at week’s end, ZDNet is reporting that Apple has already begun work on Mac OS X 10.2, code-named Jaguar, and Mac OS X Server 10.1, code-named Tigger. Sources also tell ZDNet that Apple will release a few small updates between Mac OS X 10.1 and 10.2, tying up small loose ends and any bugs that crop up.