The branching of the title reaction into several product channels has been investigated quantitatively by laser infrared kinetic spectroscopy for CH4 and CD4. It is found that OH (OD) is produced in 67 +/- 5% (60 +/- 5%) yield compared to the initial O(D-1) concentration. H (D) product is produced in 30 +/- 10%(35 +/- 10%). H2CO is produced in 5% yield in the CH4 system (it was not possible to measure the CD2O yield in the CD4 case). D2O is produced in 8% yield in the CD4 System (it was not feasible to measure the H2O yield). The ratio of the overall rate constant of the CD4 reaction to the overall rate constant of the O(ID) + N2O reaction was determined to be 1.25 +/- 0.1. A measurement of the reaction of O(ID) with NO2 gave 1.3 x 10(-11) cm(3) molecule(-1) s(-1) relative to the literature values for the rate constants of O(D-1) with H-2 and CH4. Hot atom effects in O(D-1) reactions were observed.