It's a popular question, certainly, and gets asked and answered a lot in various forums. See external link: Reddit.
Even without the time to do dailies, though, both Sean and the DayKnight community are still heavily involved in Starcraft 2. Consider the AHGL, the DayKnight Showmatches, and even DayKnights breaking SC2 world records. Sometimes, you don't have to look further than the DK RaidCall or SC2 chat to see the community playing monobattles or laddering.