Homebrew developer Psycatic has started coding his own BASIC compiler for the Sega Genesis:
http://psycatic.proboards.com/thread/5/hello-world
http://www.youtube.com/watch?v=YiAJJDh-ngo
So far it sounds like he's leaning towards open source with multiple platforms targeted. Also noted is a lean towards compatibility with BasiEgaXorz (a previous BASIC compiler not currently actively in development).
New BASIC compiler for the Sega Genesis!
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