Price isn't the only thing shrinking on <A HREF="http://news.zdnet.com/2100-1040_22-5643577.html?tag=zdnn.alert">a new generation of low-cost laptops.</A> Some are losing weight, as well. WinBook, a division of Micro Electronics, announced on Monday that it will put a $699 price tag on a LX 300 portable PC that comes with Linux and weighs 4.6 pounds. Dell has also updated its low-price laptop line for consumers, adding the Inspiron 1200, which starts at $749 and has a 14.1-inch screen. It weights 6.3 pounds, less than predecessors such as the 6.8-pound, $949 SmartStep 100N. Meanwhile, Wal-Mart continues to offer budget Balance notebooks on its Walmart.com Web site, starting at less than $500.