An anonymous reader writes to point out this interesting outgrowth of Google's Native Client: a Google engineer has ported MAME 0.143 to the browser-based platform, and written about the process in detail, outlining the overall strategy employed as well as specific problems that MAME presented. An impressive postscript from the conclusion: "The port of MAME was relatively challenging; combined with figuring out how to port SDL-based games and load resources in Native Client, the overall effort took us about 4 days to complete."