I am the creator and admin of WinAVR.
Yes, I marked the project as inactive. But for a reason.
WinAVR is not really going away. Yes, Atmel is releasing it's own AVR GCC toolchain... which is really just a continuation and evolution of WinAVR. I have set WinAVR as inactive, because it made no sense to me to be working on two identical projects, one of which would be in my spare time.
The AVR GCC toolchain (including the AVR port of GNU Binutils) is not going away either. I'm now one of the co-maintainers of the AVR port on GCC, and I can assure you that development will not only continue, but expand. It's happening right now behind the scenes.
The same goes with avr-libc. I'm also one of the co-maintainers of avr-libc. My colleague, Joerg Wunsch, and I are both committed to maintaining this project and expanding it when reasonable, and as time permits.
Almost all open source projects, including Arduino, are run by volunteers. Even though I may be at Atmel now (and have been there for a few years now), I worked on embedded systems for several years before this, and also worked on the AVR toolchain as a volunteer for quite some time. We always appreciate any sincere help on any aspect of these open source projects, even though some of the skills required may take some time to learn. Help is always welcome.
Hopefully this will clear up some of the speculation surrounding this issue. I'm a somewhat regular poster on the AVR Freaks website in the AVR GCC Forum there. My user ID there is "EW". At the very least, all the regular posters on AVR Freaks know me. However, I'm not a regular poster here (this is my first). So if anyone has any questions, please feel free to send me an email. I'll do my best to answer any questions, within what is reasonably allowed.