[rlp]

Very cool! I'd love to see proper macros in a major language like Dart. And the proposal looks good, like a mix of Scala and Nemerle.

[mst]

I'm rather impressed by nim's macro system - basically the build system contains a nim interpreter that handles the macros while still giving you compiled output.

(I wouldn't stretch to calling nim 'major' but I will say I've found it fascinating so far)