Fackue has released a build of dcgnuboy, the Gameboy hardware emulator for the Dreamcast, that adds ZIP support in response to a porting request at the dcemulation forums. This also merges in the changes from the pre-alpha 1.0.4 release of dcgnuboy that fixes a few bugs.
Quzar has been helping Fackue along the way, removed a bunch of code that was unnecessary. Bilinear filtering has also been disabled in this release.
There is a bug in the program in the menu after loading a few roms. It ends up saying "/cd/gb", and then you have to restart.