MG/Promotion
Promotion is an essential part of releasing a new version. Next to the usual channels (social media, newsletter, own forum), updates should be posted to some websites.
PR distribution channels
These expect a properly written / formatted press release.
GamesPress
UK centric games press
http://www.gamespress.com/about_howtosubmit.asp
GameRelease
Indy PR distribution service for a fee
News sites / blogs
These expect either press release, or, much preferred, individual content focusing on a specific topic (such as a more detailed look at a new feature).
IndieGameMag
Indie game news
http://indiegamemag.com/indie-developers/
https://twitter.com/indiegamemag
RTSGuru
RTS directed gaming news + community
https://twitter.com/RTSGuruDotCom
GameJolt
Indie game news
GamingOnLinux
Linux game news
RootGamer
Linux game news
IndieStatik
Indie Game blog
FreeGamer
FOSS game blog
http://freegamer.blogspot.com/p/about.html#contact
IndieGames
Indie Game blog
http://indiegames.com/index.html
Xpander68
Linux gaming vlogger
https://www.youtube.com/user/Xpander666
Linux Game Cast
Linux gaming vlogger
Nixie Pixel
Linux vlogger
https://www.youtube.com/user/nixiedoeslinux
http://www.nixiepixel.com/contact/
Linux Action Show
Linux vlogger
https://www.youtube.com/user/jupiterbroadcasting/about
http://www.jupiterbroadcasting.com/show/linuxactionshow/
http://www.jupiterbroadcasting.com/contact/
Spatry
Linux vlogger
https://www.youtube.com/user/LinuxSpatry