Stamps.com, a provider of postage via the Net, announced the completion of a $30 million private equity placement led by Paul Allen's Vulcan Ventures and Chase Capital Partners. The company also named to its board of directors Marvin Runyon, the recently retired U.S. Postmaster General, and David C. Bohnett, founder and chairman of GeoCities. Stamps.com said it will nationally roll out its Internet postage service by midyear.