This looks like a potential solution to YC's handheld development RFS. You can get a lot done in scheme by defining some continuations and passing control arou

This looks like a potential solution to YC's handheld development RFS. You can get a lot done in scheme by defining some continuations and passing control around between them. The leaf-logic is small(er) compared to making decisions about who gets control next. Most of what you wind up typing is parens (which this approach mitagates) and function-name labels (which a pointing interface would obviate). You'd do large-scale navigation with adaptive zoom (similar to the "shape" feature PLT already implements), and maybe add a heuristic search...