  The photon energy spectrum in inclusive weak radiative B -> X_s gamma decay
is computed to order alpha_s^2 beta_0. This result is used to extract a value
for the HQET parameter $\bar\Lambda$ from the average <1-2E_\gamma/m_B>, and a
value of the parameter $\lambda_1$ from <(1-2E_\gamma/m_B)^2>. An accurate
measurement of <1-2E_\gamma/m_B> can determine the size of the nonperturbative
contributions to the Upsilon(1S) mass which cannot be absorbed into the b quark
pole mass.
