And one important feature would be user configurable "Contextual Menus" when right clicking pages and links, because if we're not going to have the internal media player (initially at least), users should have an option to configure all those external scripts/programs for work-arounds for YouTube downloaders/streamers/etc.

I've also used this feature intensively for translating foreign pages to English, for configuring wget to download whole sites, etc. So it would be really nice to have this feature in Wayfarer too.