WESTWOOD, Mass. -- ShopLink here began expanding its home-shopping service in the Boston market this month, and is exploring adding another Northeast market in early 1998. ShopLink is also expanding its offerings, to approximately 15,000 stockkeeping units in grocery and nongrocery items. During a test with approximately 50 Boston-area consumers in February 1997 the company offered fewer than 10,000 SKUs, said Mike Winton, director of business development at ShopLink.
ShopLink is curr