Can't afford a CIO? Try renting one. "Everything's for lease these days--cars, furniture, computer systems. So why not a chief information officer?" That's what Janie Tremlett eventually asked herself as the vice president of technology strategic services at start-up Breakaway Solutions. Tremlett, who launched Breakaway's CIO outsourcing program this year, said she saw a growing demand among start-ups and mid-sized companies for seasoned executives to help them make their business and technology plans work.