Excerpt: [T]he new e-401(k)s are sold, set up, and managed almost exclusively online. Not only does your company handle all administrative functions over the Web but your employees also choose their investments and make changes online.... Fidelity ... launched the first e-401(k) in late 1999 and now serves 1,200 online customers. Last year, rivals began to follow. Newcomers included ... Principal Financial Group, as well as a raft of Internet startups, such as 401(k) Pro, GoldK, and Emplanet.  MORE >>