Bill is blogging at http://futureofreading.spaces.live.com/ and has a great proof of concept typography site at http://www.billhillsite.com/ there are also plenty more Bill Hill interviews from Channel 9:

• http://channel9.msdn.com/posts/Charles/Bill-Hill-Digital-Democracy-and-the-Declaration-of-Digital-Independence/
• http://channel9.msdn.com/posts/scobleizer/Cleartype-Team-Typography-in-Windows-Vista/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-There-is-only-one-space-after-a-period/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-Windows-is-not-the-most-important-OS/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-What-were-the-influences-in-your-life/
• http://channel9.msdn.com/posts/scobleizer/Bill-Hill-Do-you-think-anyone-is-going-to-read-a-book-on-the-screen/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-Why-isnt-ClearType-on-by-default-in-Windows-XP/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-How-does-ClearType-work/
• http://channel9.msdn.com/posts/TheChannel9Team/Bill-Hill-A-Hike-Around-Microsofts-Forests-Happy-Birthday-Video-5/