8chan is still alive and strong. i like the /cyber/ (cyberpunk) board and the video games text board /videogames/ very much. i like the site because it feels very "dynamic". new boards explode in popularity and die in days, and it feels like something fresh every time. I think that it is impossible to stop decay and stagnation in any community, but being able to make fresh communities easily keeps the website strong.

http://8ch.net/cyber/
http://8ch.net/videogames/
http://8ch.net/tikilounge/