Start tutorial button
active tutorial border color
standalone REPL
Collapsable tutorial section/chapter navigation
Multi-line Ruby constructs (class/def/if/etc)
Ruby syntax colorization
Integration with RubyGems to download tutorial gems
Multi-step tasks with hinting for next step
UI surface for WPF tutorials, embedding external content, etc
Use Task.legal_notice (needs some UI to show the copyright notices)
Use Task.source_files (need to show a button which can open the source file
Silverlight support
Voting feedback
Callback to task before activating it so that the task can check for pre-req
which might have been skipped), ask to skip to a subsequent task if the task
the case where the Chapter is being executed a second-time or out of order),