Technically Kunark was launched on March 25 on this server so the 2 month mark would be at least May 25th. My guess is that if you see news about a patch in late May then this is when you will see the spell.
http://www.scribd.com/doc/48825912/E...fficial-eGuide
(WARNING! It takes forever to load the document and flip trhough the pages and don't bother trying to download it unless you are willing to donate. But there is some great Kuanrk era info inside.)
The updated Kunark guide that came out in August of 2000 also had Harvest in it but that image provided in a previous post really nails down the timeline to within the first 2 months of kunark.
Long story short, Harvest not being in the game now is not a bug... but very very soon!