@G2: 1.) you could always download the videos and play them with VLC player which as a speed adjustment. But that's not a bad feature to have in the embedded playback as well. I'll let the dev team know.
2.) We already have this feature. If you click on the timecode stamps it'll skip to that topic in the video. example here:http://channel9.msdn.com/Shows/The-Defrag-Show/Defrag-DVDs-sans-Sound-Disable-Snapping-Watch-Mon-for-Folders. It is just up to the contributor to create them.
3.) Do you mean have a search box for each show/series/blog/tags page? Because you can already do that: