See todays LWN weekly edition for more on emacs features (http://www.lwn.net). I found the article quite informative (like most of LWN's stuff).
- Re: [slightly OT] Emacs21 new features (was Re: kud... Josh McKinney
- Re: [slightly OT] Emacs21 new features (was Re... Matthew Garman
- Re: [slightly OT] Emacs21 new features (wa... Alan Shutko
- Kernel documentation/book Jean-Sylvestre Gakwaya
- Re: Kernel documentation/book Wojciech Zabolotny
- Re: [slightly OT] Emacs21 new features (wa... Britton