http://www.developer.com/market_research/article.php/398362/Interest-in-iPad-Development-Declines-Slightly-but-Remains-Strong.htm
The Mobile Developer Survey, conducted in March by Appcelerator, shows that interest in iPad development has tapered a bit since January, but remains strong. 80% of developers surveyed said they were "very interested" in developing an iPad app within the year, down from 90% in January. 53% reported being very interested in iPad as a development platform. With 87% of developers very interested, iPhone is in the lead, but competition is increasing. In particular, Android, at 81%, is not far behind. In two months, interest in Blackberry development has doubled, reaching 43%, and interest in Windows Phone development has nearly tripled, reaching 34%. Interest in iPad development appears to be strongest among small businesses. 54% of companies with 10 or fewer employees, as opposed to 36% of companies with over a thousand employees, reported being very interested in iPad development.
Interest in iPad Development Declines Slightly, but Remains Strong
April 19, 2010

Image courtesy of Appcelerator