HTML5 and Canvas 2D have been released as feature complete drafts.
Not final but a stable target for development.
If you are interested in “testimonials,” see: HTML5 Definition Complete, W3C Moves to Interoperability Testing and Performance
Personally I prefer the single page HTML versions:
The Canvas 2D draft is already a single page version.
Now would be a good time to begin working on how you will use HTML5 and Canvas 2D for delivery of topic map based information.