By Lenn Thompson, Editor-in-Chief Look for a post on the future of malbec on the North Fork soon. It's been a long time coming and this Martha Clara Vineyards 2007 Malbec ($24) is the last bit of inspiration I needed to finally write it. Once a major component in the wines of Bordeaux, this large, fairly easy-to-ripen black grape is now best known in Argentina, where it is most often bottled varietally. It’s also a big player (along with cabernet sauvignon, cabernet franc, merlot and petit verdot) in Meritage and other blended red wines in the United States, Australia and…