I was thinking the same thing. Boo is decidedly more Pythonic than converge: you can write more programs that run in both Boo and Python than you can for converge and Python. Boo is pretty much a statically, implicitly typed Python. I wish there was a version of Boo that was not tied to the CLR; the closest thing we have to a high-performance language with Python syntax is Pyrex, which is good, but not quite as nice as Boo.
It isn't a goal of Converge to be Pythonic as such (particularly as Python 2.x is a philosophically different beast to Python 1.4/1.5-ish).
My impression of Boo is that its macros are a very different kettle of fish to Converge's compile-time meta-programming. Boo seems much more similar to Nemerle than Converge. As far as I can tell, there's no quasi-quoting (which would mean building ASTs by hand all the time) and no support for things like hygiene. I'd be happy to be corrected though.
Pre 0.8.1 there was no backtick and it was all manual AST afaict. 0.8.1 has [| |] which is similar to ` I believe. See second link above. Not sure about hygiene though, I guess not.