Shares in Digital Island, a network services firm, jumped nearly 19 percent following the company's initial public stock offering. The company issued 6 million shares at $10 each, raising $60 million before fees. The stock trades on the Nasdaq under the "ISLD" ticker symbol. Bear Stearns, Lehman Brothers, and Thomas Weisel Partners served as underwriters for the offering. Digital Island provides application and Web hosting for international companies.