Charles Simonyi, the Microsoft billionaire who paid $25 million for a 13-day stay on the International Space Station in April 2007, plans to return on another Russian rocket in 2009, says Virginia-based Space Adventures, which didn't say how much he was spending this time. Simonyi, who made his money helping Microsoft develop Excel as well as word, had been dating Martha Stewart for 15 years before they broke up in February; he's now engaged to Lisa Persdotter, a 28-year-old Swede, according to reports. Is she more tolerant of his rocketing career?