The hirez section reached it´s peak in mid 2005-2006. After that, things slowed down. Especially in 2008, things slowed down quite drastically. Djipi, Fed, Xeno, md, Molly, Amon Knives (Anybody remember him?) Contributed greatly, and made some awesome things (Some which sadly, were abandoned.) It is sad, because there is such potensial. Look at Banjo Kazooie on Live arcade, how great that looks. And all they did was to increase the resolution (Even higher then GTA IV, lol), fresh up the hud, and do some changes here and there. Nothing much, and it is still more fun then ever.
The other sections were more lively as well. PJ64, with the exiting times as version 1.6 was drawing close (Yes, 1.6). Actually, it caught us by surprise, and that forum was breathed new life into. Which went on for a while under the discussion of version 1.7, but have sadly been almost completely dead lately.
TOTT has some highlights now and then, but nothing much. The Dolphin section was alive and kicking for a while, but that has quieted down, even though there are updates made every single day on the emu itself.