While development is a lot slower now (because commercial games generally run flawlessly), the bsnes emulator still sees releases a few times a year as part of the higan emulation suite. These days, releases focus on nailing down the last few fractions of a percent of accuracy, cleaning up the codebase, and the cross-platform UI toolkit (!) that it uses.
This article was also the basis of an Ars Technica article by the same author: http://arstechnica.com/gaming/2011/08/accuracy-takes-power-one-mans-3ghz-quest-to-build-a-perfect-snes-emulator/
While development is a lot slower now (because commercial games generally run flawlessly), the bsnes emulator still sees releases a few times a year as part of the higan emulation suite. These days, releases focus on nailing down the last few fractions of a percent of accuracy, cleaning up the codebase, and the cross-platform UI toolkit (!) that it uses.