Either I have (good or bad?) luck or I've got some zeitgeist hunch or something, but first I had a convincing WIP of implementing Ruby in RPython when Topaz went out, and now while I'm working on a Lisp[0] — again in RPython — comes Hy.
Well at least Hy is markedly different, as my goal is not to compile to Python AST/bytecode, but "merely" be implemented in (R)Python (and C for LLVM) with no access to the Python runtime.