Steve GershomArs Orandi
Caritas in Veritate
The New Liturgical Movement
Orbis Catholicus Secundus
Fr Z's blog -- What Does the Prayer Really Say
These are my main checks right now. I also read three newspapers every day, the Des Moines Register, the New York Times and the Wall Street Journal (all online). That way I can get the liberal view, the conservative view and the local view.