The spin-polarized observables in the beta decay of 37K can be a sensitive probe of new physics if measured precisely. The TRINAT facility coupled to the exotic beams produced by ISAC/TRIUMF is well-suited for such measurements. The short-lived atoms to be studied are: cooled and localized by the neutral atom trap; highly polarized; and both the recoil and emitted positron are cleanly detected. Measurement of the beta and neutrino asymmetries to 0.1% will be competitive with other searches for new physics.