If this has macros it gives people "generic" programming in Go at the cost of having to write it all in a lisp dialect. I wouldn't personally mind it but some might :-p
As an aside, seeing more bitbucket hosted libraries on HN lately. This is a good thing. I am a fan of the github product, but I am bigger fan of not putting all your eggs in one basket.
I wish there were actual examples doing some I/O or http server where error handling comes into picture (which IMO the primary thing that messes up the Go code syntactically by repeating the "if err != nil {" block).
This and Lisp-flavored Erlang make me wonder how far one could take the idea of a Lisp syntax atop some other language. As a half-joke, I wonder if one could make a Lisp-flavored C work; should I fear or be slightly bemused at the idea of a Lisp-flavored COBOL?
I am surprised that I didn't think about this till now but Go has simple enough syntax to where Lisp could be translated into Go code, and I wonder why Haxe doesn't translate into Go with that same thought. Go definitely has plenty of libraries at it's disposal standard library wise.
In my opinion, people who complain about Lisp's parentheses are usually the ones that have absolutely no idea about Lisp, nor have they any experience with it. Once you get "into" Lisp, you do not see it as a bunch of parentheses anymore, so focusing on this aspect suggests that the person who does it, does not really have much previous experience with Lisp.
Plus the fact that a decent editor will handle the parentheses for you.
When programming in Lisp, I use Emacs with paredit (for inserting and manipulating parentheses, quotation marks, etc.) and have the default colour for parentheses be very similar to my background colour, so I can focus on the symbols and their indentation instead. The exception is when the cursor is next to an open/close parenthesis, in which case the matching parenthesis is highlighted.
Keep the functional semantics and functions, but with the basic Go syntax. If, as others have said, they don't see the parenthesis after using LISP for a while, then why bother adding them into Go in the first place?