David, from what I know they are not kosher mostly because they want to make their wines themselves (this recalls a mental image of Doron's often purple hands). Besides, from what I see in the market their wines are probably the first to be sold out - so I don't see the logic of employing an external kosher staff.
As for Pessy's question - as I said before - my favourite (and most purchased) boutique winery - due to originality/pioneering in varieties, modesty (both the people and the prices), and general additude.
Vitkin Red Israeli Journey (tasted: 23/02/2008) - Fruit forward on the nose and palete, for a moment feels very smooth and a moment later gently stings the tongue, spreding some spices around. Perhaps not very complex, but delicious nonetheless. Should go well with food, such as chicken, turkey and slightly spicey fish. 65NIS, good buy.
I tasted the 05 Pino about a year ago and the 06 at passover. Both were nice, fruity/modern expressions of the variety, light and easy drinking. Although I have nothing negative to say about them, to my taste other wines the winery produces are more impressive, and specifically worth pursuing is the Carignan, the hard-to-get Petite Sirah and the Late Harvest.