f(B) for various actions: Approaching the continuum limit with dynamical fermions

We present results for pseudoscalar decay constants of heavy-light mesons u sing both quenched and N-f = 2 dynamical fermion configurations. A variety of fermion actions is investigated: Wilson, nonperturbative clover, and fat -link clover. For heavy quarks the Fermilab formalism is applied. In the qu enched approximation, results with the nonperturbatively improved clover ac tion of the Alpha collaboration allow us to study the systematic error of t he continuum extrapolation from the Wilson action. In addition, we use quen ched configurations to explore the effects of fattening. The lessons from t he quenched analyses are then applied to data with dynamical fermions, wher e both Wilson and fat-link clover actions have been used. This allows us to attempt a continuum extrapolation of the dynamical results.