According to Admob (via TUAW), Apple's share of the mobile Web is big and might just be getting bigger:
Worldwide requests from Apple devices grew 28% month over month to 1.2 billion in January. Building on its strong December, iPod Touch growth outpaced iPhone growth in top markets. The iPod Touch now represents 40% of Apple requests, up from 20% in September.
People like great mobile browsers that can handle HTML, CSS, and AJAX, who'd have thunk it?